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Kelvin

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1786: 2142: 42: 803: 2602:. The word "kelvin" is not capitalized when used as a unit. It may be in plural form as appropriate (for example, "it is 283 kelvins outside", as for "it is 50 degrees Fahrenheit" and "10 degrees Celsius"). The unit's symbol K is a capital letter, per the SI convention to capitalize symbols of units derived from the name of a person. It is common convention to capitalize Kelvin when referring to Lord Kelvin or the Kelvin scale. 361: 4865: 3126:, p. 104: "If we push the strict principle of graduation, stated above, sufficiently far, we should arrive at a point corresponding to the volume of air being reduced to nothing, which would be marked as −273° of the scale (−100/·366, if ·366 be the coefficient of expansion); and therefore −273° of the air-thermometer is a point which cannot be reached at any finite temperature, however low." 2694: 485: 1663: 931:'s hypothesis", on account of it having been first assumed by Mayer. Thomson arranged numerous experiments in coordination with Joule, eventually concluding by 1854 that Joule's formula was correct and the effect of temperature on the density of saturated steam accounted for all discrepancies with Regnault's data. Therefore, in terms of the modern Kelvin scale 1888:. A challenge was to avoid degrading the accuracy of measurements close to the triple point. The redefinition was further postponed in 2014, pending more accurate measurements of the Boltzmann constant in terms of the current definition, but was finally adopted at the 26th CGPM in late 2018, with a value of 1104:. In 1854, Thomson and Joule thus formulated a second absolute scale that was more practical and convenient, agreeing with air thermometers for most purposes. Specifically, "the numerical measure of temperature shall be simply the mechanical equivalent of the thermal unit divided by Carnot’s function." 3692:, festgesetzt worden. Die Bezeichnung Skot wurde von der IBK nicht ĂŒbernommen, dafĂŒr soll "skotopisches Stilb" gesagt werden. Als höchstzulĂ€ssiger Grenzwert fĂŒr die Dunkelleuchtdichte ist in Deutschland 10 Skot festgesetzt worden, um eine Verwendung der Dunkelleuchtdichte im Gebiet des gemischten 1911:
For scientific purposes, the redefinition's main advantage is in allowing more accurate measurements at very low and very high temperatures, as the techniques used depend on the Boltzmann constant. Independence from any particular substance or measurement is also a philosophical advantage. The kelvin
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Newell, D B; Cabiati, F; Fischer, J; Fujii, K; Karshenboim, S G; Margolis, H S; de MirandĂ©s, E; Mohr, P J; Nez, F; Pachucki, K; Quinn, T J; Taylor, B N; Wang, M; Wood, B M; Zhang, Z; et al. (Committee on Data for Science and Technology (CODATA) Task Group on Fundamental Constants) (2018-01-29).
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zu vermeiden, da in diesem Bereich die photometrischen MaßgrĂ¶ĂŸen wegen der allmĂ€hlich gleitenden Augenempfindlichkeitskurve ihren Sinn verlieren. Skot, abgek sk, Einheit fĂŒr die Dunkelleuchtdichte, welche fĂŒr zahlenmĂ€ĂŸige Angaben und zum Anschluß der Dunkelleuchtdichte an die normale Leuchtdichte
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A derived unit is usually singular in English, for example, the value 3 m·K/W is usually spelled out as 'three square meter kelvin per watt', and the value 3 C·m/V is usually spelled out as 'three coulomb meter squared per volt'. However, a 'single' unit may be plural; for example, the
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Fischer, J; Fellmuth, B; Gaiser, C; Zandt, T; Pitre, L; Sparasci, F; Plimmer, M D; de Podesta, M; Underwood, R; Sutton, G; Machin, G; Gavioso, R M; Madonna Ripa, D; Steur, P P M; Qu, J; Feng, X J; Zhang, J; Moldover, M R; Benz, S P; White, D R; Gianfrani, L; Castrillo, A; Moretti, L; Darquié, B;
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The parameters of the scale were arbitrarily chosen to coincide with the Celsius scale at 0° and 100 Â°C or 273 and 373 K (the melting and boiling points of water). On this scale, an increase of approximately 222 degrees corresponds to a doubling of Kelvin temperature, regardless of the
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of water, approximately 771.8 foot-pounds force per degree Fahrenheit per pound (4,153 J/K/kg). Thomson was initially skeptical of the deviations of Joule's formula from experiment, stating "I think it will be generally admitted that there can be no such inaccuracy in Regnault's part of the
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of water can be affected quite dramatically by raising or lowering the pressure), the triple point condition for a given substance can occur only at a single pressure and only at a single temperature. By the 1940s, the triple point of water had been experimentally measured to be about 0.6% of
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The difference of temperatures between the freezing- and boiling-points of water under standard atmospheric pressure shall be called 100 degrees. (The same increment as the Celsius scale) Thomson's best estimates at the time were that the temperature of freezing water was 273.7 K and the
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which underpin the concept of absolute zero. Instead, they chose defining points within the range of human experience that could be reproduced easily and with reasonable accuracy, but lacked any deep significance in thermal physics. In the case of the Celsius scale (and the long since defunct
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value) close to 0 Â°C. This was justified on the grounds that the triple point was judged to give a more accurately reproducible reference temperature than the melting point. The triple point could be measured with ±0.0001 Â°C accuracy, while the melting point just to ±0.001 Â°C.
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Digital cameras and photographic software often use colour temperature in K in edit and setup menus. The simple guide is that higher colour temperature produces an image with enhanced white and blue hues. The reduction in colour temperature produces an image more dominated by reddish,
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In 1967/1968, Resolution 3 of the 13th CGPM renamed the unit increment of thermodynamic temperature "kelvin", symbol K, replacing "degree Kelvin", symbol °K. The 13th CGPM also held in Resolution 4 that "The kelvin, unit of thermodynamic temperature, is equal to the fraction
512:. The scale proposed in the paper turned out to be unsatisfactory, but the principles and formulas upon which the scale was based were correct. For example, in a footnote, Thomson derived the value of −273 Â°C for absolute zero by calculating the negative reciprocal of 0.00366—the 4182:
value 5 kPa is spelled out as 'five kilopascals', although 'five kilopascal' is acceptable. If in such a single-unit case the number is less than one, the unit is always singular when spelled out; for example, 0.5 kPa is spelled out as 'five-tenths kilopascal'.
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In 2005, noting that the triple point could be influenced by the isotopic ratio of the hydrogen and oxygen making up a water sample and that this was "now one of the major sources of the observed variability between different realizations of the water triple point", the
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Milton responded to a question about what would happen if ... the CIPM or the CGPM voted not to move forward with the redefinition of the SI. He responded that he felt that by that time the decision to move forward should be seen as a foregone
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to contain the uncertainty of water's triple point and water still normally freezes at 0 Â°C to a high degree of precision. But before the redefinition, the triple point of water was exact and the Boltzmann constant had a measured value of
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The absolute values of two temperatures are to one another in the proportion of the heat taken in to the heat rejected in a perfect thermodynamic engine working with a source and refrigerator at the higher and lower of the temperatures
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scale (symbol °C) and the Kelvin scale have the exact same magnitude; that is, a rise of 1 K is equal to a rise of 1 Â°C and vice versa, and any temperature in degrees Celsius can be converted to kelvin by adding 273.15.
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first developed and proposed the scale. It was often called the "absolute Celsius" scale in the early 20th century. The kelvin was formally added to the International System of Units in 1954, defining 273.16 K to be the
1767:(CIPM), a committee of the CGPM, affirmed that for the purposes of delineating the temperature of the triple point of water, the definition of the kelvin would refer to water having the isotopic composition specified for 1884:. The committee hoped the program would be completed in time for its adoption by the CGPM at its 2011 meeting, but at the 2011 meeting the decision was postponed to the 2014 meeting when it would be considered part of a 1649:
These two properties would be featured in all future versions of the Kelvin scale, although it was not yet known by that name. In the early decades of the 20th century, the Kelvin scale was often called the "absolute
476:) by about 1/273 parts per degree Celsius of temperature's change up or down, between 0 Â°C and 100 Â°C. Extrapolation of this law suggested that a gas cooled to about −273 Â°C would occupy zero volume. 516:
of an ideal gas per degree Celsius relative to the ice point. This derived value agrees with the currently accepted value of −273.15 Â°C, allowing for the precision and uncertainty involved in the calculation.
1479: 1557: 954: 2791: 900: 1352: 1627: 1670:. The solid green line applies to most substances; the dashed green line gives the anomalous behavior of water. The boiling line (solid blue) runs from the triple point to the 601: 4218: 716: 4079: 1393: 777: 1223: 1849: 1764: 837: 670: 4910: 4436: 1277: 1250: 1163: 1136: 1654:" scale, indicating Celsius degrees counted from absolute zero rather than the freezing point of water, and using the same symbol for regular Celsius degrees, °C. 1082: 797: 3968: 1728:
In 1954, with absolute zero having been experimentally determined to be about −273.15 Â°C per the definition of °C then in use, Resolution 3 of the 10th
3727: = 2360 Â°K vereinbart. Eine Lichtquelle strahlt mit der Dunkelleuchtdichte 1 sk, wenn sie photometrisch gleich einer Strahlung der Farbtemperatur 1183: 1102: 949: 920: 736: 641: 621: 4172: 4840: 3928: 5128: 3899: 1729: 4397:"On the Dynamical Theory of Heat, with numerical results deduced from Mr Joule's equivalent of a Thermal Unit, and M. Regnault's Observations on Steam" 4372: 3893:"General Conference on Weights and Measures approves possible changes to the International System of Units, including redefinition of the kilogram" 3824: 2094:
For practical purposes, the redefinition was unnoticed; enough digits were used for the Boltzmann constant to ensure that 273.16 K has enough
1732:(CGPM) introduced a new internationally standardized Kelvin scale which defined the triple point as exactly 273.15 + 0.01 = 273.16 degrees Kelvin. 927:
data, and there remains only the uncertainty regarding the density of saturated steam". Thomson referred to the correctness of Joule's formula as "
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In 1948, the Celsius scale was recalibrated by assigning the triple point temperature of water the value of 0.01 Â°C exactly and allowing the
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appear bluish. Colour temperature is important in the fields of image projection and photography, where a colour temperature of approximately
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Dunkelleuchtdichte. Unter Zugrundelegung dieser Empfindlichkeitskurve hat man 1940 in Deutschland die Dunkelleuchtdichte mit der Einheit
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of the temperature difference between the melting and boiling points. The same temperature interval was later used for the Kelvin scale.
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at standard atmospheric pressure to have an empirically determined value (and the actual melting point at ambient pressure to have a
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radiator emits light with a frequency distribution characteristic of its temperature. Black bodies at temperatures below about
1671: 1398: 5138: 5133: 4850: 4422: 61: 3417:"A quantitative investigation of certain relations between the gaseous, the liquid, and the solid states of water-substance" 2158: 2122:. Afterward, the Boltzmann constant is exact and the uncertainty is transferred to the triple point of water, which is now 4565: 2975: 253: 5118: 1759:, this left the kelvin, the second, and the kilogram as the only SI units not defined with reference to any other unit. 672:
was "Carnot’s function", a substance-independent quantity depending on temperature, motivated by an obsolete version of
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Moufarej, E; Daussy, C; Briaudeau, S; Kozlova, O; Risegari, L; Segovia, J J; MartĂ­n, M C; del Campo, D (2018-04-01).
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derived from the kelvin is the degree Celsius. Like other SI units, the kelvin can also be modified by adding a
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and consequently that the three curves would meet or cross each other in one point, which I have called the
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defined by the metre (m), second (s), and kilogram (kg). Those SI base units are themselves defined by the
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This definition by itself is not sufficient. Thomson specified that the scale should have two properties:
1559:, one obtains the general principle of an absolute thermodynamic temperature scale for the Carnot engine, 923: 3832: 2199: 1040:{\displaystyle T_{1848}=100\times {\frac {\log(T/{\text{273 K}})}{\log({\text{373 K}}/{\text{273 K}})}}} 285: 3903: 4445: 4335: 4128: 4049: 3477: 3428: 3284: 2723: 2597: 840: 810:
When Thomson published his paper in 1848, he only considered Regnault's experimental measurements of
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chosen to approximate the natural air pressure at sea level. Thus, an increment of 1 Â°C equals
1084:, the relationship between work and heat for a perfect thermodynamic engine was simply the constant 4830: 3803: 3647: 2095: 1675: 679: 3992: 3753: 3639: 3585: 3532: 1704:. While any two phases could coexist along a range of temperature-pressure combinations (e.g. the 1357: 741: 4887: 3734: = 2360 Â°K und der Leuchtdichte von 10 asb (Apostilb) ist. Bei der Farbtemperatur 3511: 2280: 2276: 2164: 2145: 2001: 1861: 1188: 545: 405:) the melting point of ice served as such a starting point, with Celsius being defined (from the 301: 102: 41: 2212: 544:." Specifically, Thomson expressed the amount of work necessary to produce a unit of heat (the 4868: 4754: 4542: 4296: 4266: 4241: 4154: 3659: 3493: 3436: 3371: 3312: 3048: 3029: 2253: 2210: 1913: 1807: 1721: 513: 264: 4260: 3868: 813: 646: 4500: 4144: 4136: 4059: 3651: 3485: 3302: 3292: 2245: 2130: 1985: 1821: 928: 473: 402: 2909: 2129:
The new definition officially came into force on 20 May 2019, the 144th anniversary of the
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2019 SI unit dependencies. The kelvin (K) is now fixed in terms of the Boltzmann constant (
1255: 1228: 1141: 1114: 4621: 3697: 3693: 2302: 1979: 1835: 1803: 1067: 802: 782: 461: 4287: 3741: = 2360 Â°K gilt also die Relation: 1 sk = 10 asb = 10/π sb. 1916:(see 2019 SI unit dependencies diagram), allowing the kelvin to be expressed exactly as: 4132: 4054: 3481: 3432: 3288: 2626:
provided for compatibility with legacy encodings. The Unicode standard recommends using
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is the temperature of the cold reservoir in Celsius. The Carnot function is defined as
1168: 1087: 934: 905: 721: 626: 606: 418: 385: 327: 261: 3261:, p. 105: "The arbitrary points which coincide on the two scales are 0° and 100°" 3003: 2643:. "Three letterlike symbols have been given canonical equivalence to regular letters: 472:
that, at constant pressure, ideal gases expanded or contracted their volume linearly (
5107: 4980: 4835: 4759: 4696: 4686: 4495: 4465: 4354: 3681: 2827:"SI Brochure: The International System of Units (SI) – 9th edition (updated in 2022)" 2699: 2306: 1856:) using a more experimentally rigorous method. In particular, the committee proposed 1853: 1717: 1713:
and very close to 0.01 Â°C per the historical definition of Celsius then in use.
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The scale was designed on the principle that "a unit of heat descending from a body
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and centigrade (later Celsius). These scales predated much of the modern science of
5041: 4990: 4975: 4779: 4736: 4721: 4676: 4656: 4573: 4490: 4485: 2235: 2223: 1688: 1629:. The definition can be shown to correspond to the thermometric temperature of the 1108: 398: 369: 245: 3831:. Bureau International des Poids et Mesures. 1967. Section 2.1.1.5. Archived from 3465: 5077: 5010: 4651: 4606: 4449: 3677: 2717: 2310: 2249: 2241: 505: 484: 465: 365: 280: 249: 20: 4140: 4064: 4018: 3960: 3775:"Resolution 4: Definition of the SI unit of thermodynamic temperature (kelvin)" 2847: 372:(shown here in Celsius) before the physical nature of heat was well understood. 5072: 4965: 4924: 4470: 3713: 3655: 2689: 2272: 2168: 381: 296:
scales were redefined in terms of the Kelvin scale using this definition. The
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According to SI convention, the kelvin is never referred to nor written as a
5016: 4716: 4631: 3858:"Draft Chapter 2 for SI Brochure, following redefinitions of the base units" 2693: 2261: 2187: 4158: 3688:(IBK) die Bezugstemperatur auf 2046 Â°K, die Erstarrungstemperatur des 3316: 2976:"Handbook 44 – 2022 – Appendix C – General Tables of Units of Measurement" 1844:). Black arrows trace the dependencies from these constants to the kelvin. 5092: 5006: 4596: 4475: 3929:"Report on the Meeting of the CODATA Task Group on Fundamental Constants" 3689: 2878:"A Turning Point for Humanity: Redefining the World's Measurement System" 1693: 1053: 922:
is "the mechanical equivalent of a unit of heat", now referred to as the
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of light sources. Colour temperature is based upon the principle that a
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suggested to Thomson that the true formula for Carnot's function was
319: 127: 3646:(in German) (1 ed.). Berlin / Göttingen / Heidelberg, Germany: 540:, would give out the same mechanical effect, whatever be the number 4262:
Chemistry, Student Study Guide: The Study of Matter and Its Changes
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Equivalent temperatures in kelvin (K), Celsius (°C), and
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This article is about the unit of temperature. For the person, see
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of the thermodynamic temperature of the triple point of water."
4883: 4538: 4418: 4341:. 9th Edition. International Committee for Weights and Measures 4295:. Mountain View, CA, USA: The Unicode Consortium. August 2015. 3069:(1802), "Recherches sur la dilatation des gaz et des vapeurs", 3053:
Memoirs of the Literary and Philosophical Society of Manchester
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Memoirs of the Literary and Philosophical Society of Manchester
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geschaffen wurde. FĂŒr diesen Anschluß wurde die Strahlung des
2682:. In all three instances, the regular letter should be used." 2203: 3720: = 2360 Â°K, d.h. eine Strahlung der Farbtemperatur 3607:"Resolution 3: SI unit of thermodynamic temperature (kelvin)" 2792:"Mise en pratique for the definition of the kelvin in the SI" 2198:
are based, in part, upon their surface temperature, known as
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Thermometer showing temperature in kelvin and degrees Celsius
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began a programme to redefine the kelvin (along with other
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is the amount of heat energy transferred into the system,
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Thomson understood that with Joule's proposed formula for
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editions from the 1920s and 1950s, the article "Planets".
2640: 1474:{\displaystyle T_{H}=J\times Q_{H}\times (t_{H}-t_{C})/W} 300:
now defines the kelvin in terms of energy by setting the
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and can be used to determine the noise temperature of a
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is the temperature of the hot reservoir in Celsius, and
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The NIST Reference on Constants, Units, and Uncertainty
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1 sk = 10 asb gilt. 1948 ist von der
5065: 4999: 4943: 4917: 4823: 4745: 4620: 4572: 2720:– product of the Boltzmann constant and temperature 212: 190: 170: 143: 98: 88: 80: 72: 60: 55: 34: 4334:Bureau International des Poids et Mesures (2019). 1621: 1551: 1473: 1387: 1346: 1271: 1244: 1217: 1177: 1157: 1130: 1107:To explain this definition, consider a reversible 1096: 1076: 1039: 943: 914: 894: 831: 791: 771: 730: 710: 664: 635: 615: 595: 4336:"The International System of Units (SI) Brochure" 3273:"A History of Thermodynamics: The Missing Manual" 1552:{\displaystyle T_{H}-T_{C}=J\times (t_{H}-t_{c})} 951:, the first scale could be expressed as follows: 432:This definition assumes pure water at a specific 4403:. Transactions of the Royal Society of Edinburgh 2206:, for instance, has an effective temperature of 2183:is required to match "daylight" film emulsions. 1765:International Committee for Weights and Measures 267:that starts at the lowest possible temperature ( 2821: 2819: 2817: 2815: 2813: 2811: 1912:now only depends on the Boltzmann constant and 1692:to describe the combination of temperature and 2747:The absolute uncertainty can be calculated as 2275:) is a type of thermal noise derived from the 1645:temperature of boiling water was 373.7 K. 4895: 4550: 4430: 4011: 4009: 2163:The kelvin is often used as a measure of the 1700:of a substance were capable of coexisting in 643:is the coefficient of thermal expansion, and 8: 4259:Brady, James E.; Senese, Fred (2008-01-28). 3825:"Unit of thermodynamic temperature (kelvin)" 2957:. Taking Measure (official blog of the NIST) 2904: 2902: 2900: 2898: 2244:, the kelvin is used as an indicator of how 271:), taken to be 0 K. By definition, the 4841:Historical definitions of the SI base units 2932: 2930: 1048:starting temperature, and "infinite cold" ( 895:{\displaystyle \mu (t)=J{\frac {E}{1+Et}},} 4902: 4888: 4880: 4557: 4543: 4535: 4437: 4423: 4415: 4356:Mathematical and physical papers: Volume I 3900:General Conference on Weights and Measures 3421:Proceedings of the Royal Society of London 2175:appear reddish, whereas those above about 2114:, with a relative standard uncertainty of 1822:caesium-133 hyperfine transition frequency 1730:General Conference on Weights and Measures 1347:{\displaystyle \mu =W/Q_{H}/(t_{H}-t_{C})} 413:) by calibrating a thermometer such that: 40: 31: 4148: 4063: 4053: 3306: 3296: 1802:. The joule is not shown because it is a 1682:In 1873, William Thomson's older brother 1613: 1604: 1598: 1585: 1576: 1570: 1564: 1540: 1527: 1505: 1492: 1486: 1463: 1454: 1441: 1425: 1406: 1400: 1377: 1365: 1359: 1335: 1322: 1310: 1304: 1295: 1284: 1263: 1257: 1236: 1230: 1209: 1196: 1190: 1170: 1149: 1143: 1122: 1116: 1089: 1069: 1026: 1021: 1016: 997: 992: 977: 962: 956: 936: 907: 868: 848: 815: 784: 758: 752: 743: 723: 687: 681: 648: 628: 608: 585: 553: 4379:. Philosophical Magazine. Archived from 3851: 3849: 3102: 3100: 2315: 2248:a circuit is in relation to an ultimate 2140: 1784: 500:In 1848, William Thomson, who was later 460:From 1787 to 1802, it was determined by 351:Thermodynamic temperature § History 4353:Thomson, William (Lord Kelvin) (1882). 4242:"Writing with SI (Metric System) Units" 4080:"Updating the definition of the kelvin" 3961:"2022 CODATA Value: Boltzmann constant" 3804:"Resolution 10 of the 23rd CGPM (2007)" 3703:Deutschen Lichttechnischen Gesellschaft 3402: 3390: 3353: 3341: 3329: 3258: 3246: 3234: 3222: 3210: 3198: 3186: 3174: 3162: 3147: 3135: 3123: 3091: 2951:"Busting Myths about the Metric System" 2775: 2740: 2713:International Temperature Scale of 1990 2148:(right) of various light sources (left) 1622:{\displaystyle Q_{H}/T_{H}=Q_{C}/T_{C}} 3993:"Resolution 1 of the 26th CGPM (2018)" 3754:"Resolution 4 of the 13th CGPM (1967)" 3686:Internationalen Beleuchtungskommission 3586:"Resolution 3 of the 13th CGPM (1967)" 3533:"Resolution 3 of the 10th CGPM (1954)" 2218:as adopted by IAU 2015 Resolution B3. 491:, the namesake of the unit of measure. 364:An ice water bath offered a practical 4265:. John Wiley & Sons. p. 15. 3512:"Resolution 3 of the 9th CGPM (1948)" 3459: 3457: 2324: 2321: 2230:Kelvin as a unit of noise temperature 322:per kelvin; every 1 K change of 7: 2729:Outline of metrology and measurement 1696:at which the solid, liquid, and gas 1052:) has a numerical value of negative 2639:instead; that is, a normal capital 2303:SI derived unit with a special name 279:The 19th century British scientist 1757:the 1983 redefinition of the metre 1354:, and the absolute temperature as 14: 5129:William Thomson, 1st Baron Kelvin 4371:Thomson, William (October 1848). 4289:The Unicode Standard, Version 8.0 4220:CERN English Language Style Guide 3898:(Press release). SĂšvres, France: 3642:. In Westphal, Wilhelm H. (ed.). 3464:Swinton, F. L. (September 1967). 2297:Orders of magnitude (temperature) 510:On an Absolute Thermometric Scale 147: 93:William Thomson, 1st Baron Kelvin 4864: 4863: 2949:Benham, Elizabeth (2020-10-06). 2708:Comparison of temperature scales 2692: 2605:The unit symbol K is encoded in 2194:of stars and their place on the 1769:Vienna Standard Mean Ocean Water 1185:is the work done by the system ( 1165:is the heat leaving the system, 514:coefficient of thermal expansion 4395:Thomson, William (March 1851). 4312:from the original on 2016-12-06 3640:"Nox, Dunkelleuchtdichte, Skot" 3107:Magie, William Francis (1935). 623:is the temperature in Celsius, 596:{\displaystyle \mu (t)(1+Et)/E} 4851:System of units of measurement 3927:Wood, B. (3–4 November 2014). 3370:. Cham: Springer. p. 77. 3081:English translation (extract). 2291:Derived units and SI multiples 2264:(which produces an associated 1546: 1520: 1460: 1434: 1341: 1315: 1031: 1013: 1002: 986: 859: 853: 826: 820: 705: 699: 659: 653: 582: 567: 564: 558: 1: 4359:. Cambridge University Press. 3470:Journal of Chemical Education 3368:A treatise of heat and energy 1873:) would take the exact value 1711:standard atmospheric pressure 1395:. One finds the relationship 711:{\displaystyle T_{1848}=f(T)} 254:International System of Units 3902:. 2011-10-23. Archived from 3779:Resolutions of the 13th CGPM 3611:Resolutions of the 13th CGPM 3558:Resolutions of the 10th CGPM 3466:"The triplet point of water" 1388:{\displaystyle T_{H}=J/\mu } 772:{\displaystyle dT_{1848}/dT} 4038:for the revision of the SI" 4019:"The CODATA 2017 values of 3938:. p. 7. Archived from 3332:, p. 190, formula (7). 2762:for all practical purposes. 2317:SI multiples of kelvin (K) 2196:Hertzsprung–Russell diagram 1218:{\displaystyle Q_{H}-Q_{C}} 528:° of this scale, to a body 378:multiple temperature scales 5155: 3650:. pp. 125, 271, 389. 3636:Westphal, Wilhelm Heinrich 2848:"SI base unit: kelvin (K)" 2758:, which can be rounded to 2294: 2233: 2156: 1778: 348: 18: 4859: 4519: 4456: 3656:10.1007/978-3-662-12706-3 3644:Physikalisches Wörterbuch 3271:Saslow, WM (2020-01-07). 2344: 2341: 2338: 2335: 2332: 2329: 2202:. The photosphere of the 2159:Stefan–Boltzmann constant 1702:thermodynamic equilibrium 376:During the 18th century, 324:thermodynamic temperature 166: 39: 4805:minute and second of arc 4141:10.1088/1681-7575/aaa790 4065:10.1088/1681-7575/aa950a 3856:Ian Mills (2010-09-29). 3829:SI Brochure, 8th edition 3344:, pp. 106, 232–236. 3110:A Source Book In Physics 3067:Gay-Lussac, Joseph Louis 2937:Encyclopaedia Britannica 2309:that multiplies it by a 2285:Friis formulas for noise 380:were developed, notably 4846:2019 revision of the SI 4199:www.merriam-webster.com 4117:"The Boltzmann project" 3415:Thomson, James (1873). 2624:compatibility character 1781:2019 revision of the SI 832:{\displaystyle \mu (t)} 665:{\displaystyle \mu (t)} 470:Joseph Louis Gay-Lussac 394:kinetic theory of gases 298:2019 revision of the SI 208: âˆ’ 459.67) Â°F 186: âˆ’ 273.15) Â°C 25:Kelvin (disambiguation) 4195:"Definition of KELVIN" 3366:Wang, Lin-Shu (2020). 2910:"Kelvin: Introduction" 2637:LATIN CAPITAL LETTER K 2192:stellar classification 2149: 1845: 1679: 1623: 1553: 1475: 1389: 1348: 1273: 1246: 1219: 1179: 1159: 1132: 1098: 1078: 1041: 945: 924:specific heat capacity 916: 896: 833: 807: 793: 773: 732: 712: 666: 637: 617: 597: 492: 373: 161:... corresponds to ... 23:. For other uses, see 16:SI unit of temperature 5139:Scales in meteorology 5134:Scales of temperature 3867:. CCU. Archived from 3674:. pp. 271, 389: 3047:Dalton, John (1801). 3028:Dalton, John (1801). 2622:. However, this is a 2258:Johnson–Nyquist noise 2200:effective temperature 2144: 1858:redefining the kelvin 1788: 1665: 1658:Triple point standard 1624: 1554: 1476: 1390: 1349: 1274: 1272:{\displaystyle t_{C}} 1247: 1245:{\displaystyle t_{H}} 1220: 1180: 1160: 1158:{\displaystyle Q_{C}} 1133: 1131:{\displaystyle Q_{H}} 1099: 1079: 1060:Modern absolute scale 1042: 946: 917: 897: 834: 805: 794: 774: 733: 713: 667: 638: 618: 598: 487: 363: 286:triple point of water 4944:Derived non EM units 4747:Other accepted units 3055:. 5 part 2: 595–602. 3036:. 5 part 2: 550–574. 2724:Negative temperature 1563: 1485: 1399: 1358: 1283: 1256: 1229: 1189: 1169: 1142: 1115: 1088: 1077:{\displaystyle \mu } 1068: 955: 935: 906: 847: 841:James Prescott Joule 814: 792:{\displaystyle \mu } 783: 742: 722: 680: 647: 627: 607: 552: 508:, published a paper 496:First absolute scale 5119:Scottish inventions 4831:Conversion of units 4522:Conversion formulas 4230:. 2022. p. 64. 4133:2018Metro..55R...1F 4055:2018Metro..55L..13N 3648:Springer-Verlag OHG 3482:1967JChEd..44..541S 3433:1873RSPS...22...27T 3289:2020Entrp..22...77S 3225:, pp. 214–215. 3094:, pp. 100–106. 2790:BIPM (2019-05-20). 2318: 2271:when combined with 1914:universal constants 1808:universal constants 1676:supercritical fluid 779:is proportional to 532:at the temperature 524:at the temperature 455: 56:General information 5114:1848 introductions 4624:with special names 2316: 2277:Boltzmann constant 2165:colour temperature 2153:Colour temperature 2150: 2146:Colour temperature 2124:273.1600(1) K 2096:significant digits 1862:Boltzmann constant 1846: 1680: 1619: 1549: 1471: 1385: 1344: 1269: 1242: 1215: 1175: 1155: 1128: 1094: 1074: 1037: 941: 912: 892: 839:. That same year, 829: 808: 789: 769: 728: 708: 662: 633: 613: 593: 546:thermal efficiency 493: 374: 330:change of exactly 302:Boltzmann constant 222:    214:    200:    192:    178:    172:    5101: 5100: 5066:Derived ESU units 5000:Derived EMU units 4877: 4876: 4755:astronomical unit 4532: 4531: 4302:978-1-936213-10-8 4272:978-0-470-18464-6 3714:schwarzen Körpers 3665:978-3-662-12707-0 3490:10.1021/ed044p541 3298:10.3390/e22010077 3071:Annales de Chimie 3004:"Kelvin: History" 2589: 2588: 2254:noise temperature 1775:2019 redefinition 1178:{\displaystyle W} 1097:{\displaystyle J} 1035: 1029: 1019: 1000: 944:{\displaystyle T} 915:{\displaystyle J} 887: 731:{\displaystyle T} 636:{\displaystyle E} 616:{\displaystyle t} 326:corresponds to a 265:temperature scale 234: 233: 144:Conversions 5146: 4904: 4897: 4890: 4881: 4867: 4866: 4559: 4552: 4545: 4536: 4439: 4432: 4425: 4416: 4411: 4409: 4408: 4391: 4389: 4388: 4360: 4349: 4347: 4346: 4340: 4321: 4320: 4318: 4317: 4311: 4294: 4283: 4277: 4276: 4256: 4250: 4249: 4238: 4232: 4231: 4225: 4215: 4209: 4208: 4206: 4205: 4191: 4185: 4184: 4169: 4163: 4162: 4152: 4111: 4105: 4104: 4102: 4101: 4095: 4089:. Archived from 4084: 4076: 4070: 4069: 4067: 4057: 4013: 4004: 4003: 4001: 4000: 3989: 3980: 3979: 3977: 3976: 3957: 3951: 3950: 3944: 3933: 3924: 3918: 3917: 3915: 3914: 3908: 3897: 3889: 3883: 3882: 3880: 3879: 3873: 3862: 3853: 3844: 3843: 3841: 3840: 3821: 3815: 3814: 3812: 3811: 3800: 3794: 3793: 3791: 3790: 3771: 3765: 3764: 3762: 3761: 3750: 3744: 3743: 3711: 3673: 3672: 3632: 3626: 3625: 3623: 3622: 3603: 3597: 3596: 3594: 3593: 3582: 3573: 3572: 3570: 3569: 3550: 3544: 3543: 3541: 3540: 3529: 3523: 3522: 3520: 3519: 3508: 3502: 3501: 3461: 3452: 3451: 3412: 3406: 3400: 3394: 3388: 3382: 3381: 3363: 3357: 3351: 3345: 3339: 3333: 3327: 3321: 3320: 3310: 3300: 3283:(1). eqn. (36). 3268: 3262: 3256: 3250: 3244: 3238: 3232: 3226: 3220: 3214: 3208: 3202: 3196: 3190: 3184: 3178: 3172: 3166: 3160: 3151: 3145: 3139: 3133: 3127: 3121: 3115: 3114: 3104: 3095: 3089: 3083: 3078: 3063: 3057: 3056: 3044: 3038: 3037: 3025: 3019: 3018: 3016: 3015: 3000: 2994: 2993: 2991: 2990: 2980: 2972: 2966: 2965: 2963: 2962: 2946: 2940: 2934: 2925: 2924: 2922: 2921: 2906: 2893: 2892: 2890: 2889: 2874: 2859: 2858: 2856: 2855: 2844: 2838: 2837: 2835: 2834: 2823: 2806: 2805: 2803: 2802: 2787: 2763: 2761: 2757: 2756: 2754: 2745: 2702: 2697: 2696: 2681: 2678: 2675: 2673: 2668: 2665: 2662: 2660: 2655: 2652: 2649: 2647: 2638: 2635: 2632: 2630: 2621: 2618: 2615: 2613: 2319: 2224:"warmer" colours 2209: 2182: 2178: 2174: 2131:Metre Convention 2125: 2121: 2119: 2113: 2111: 2107: 2104: 2089: 2088: 2087: 2085: 2084: 2076: 2073: 2072: 2071: 2053: 2051: 2050: 2049: 2048: 2045: 2042: 2039: 2036: 2030: 2027: 2026: 2025: 2014: 2013: 2012: 2010: 2009: 1999: 1996: 1995: 1994: 1972: 1970: 1969: 1967: 1966: 1963: 1960: 1954: 1952: 1949: 1946: 1939: 1936: 1935: 1933: 1930: 1920:1 kelvin = 1907: 1905: 1902: 1896: 1883: 1881: 1878: 1872: 1842: 1833: 1818: 1797: 1751: 1749: 1748: 1745: 1742: 1686:coined the term 1628: 1626: 1625: 1620: 1618: 1617: 1608: 1603: 1602: 1590: 1589: 1580: 1575: 1574: 1558: 1556: 1555: 1550: 1545: 1544: 1532: 1531: 1510: 1509: 1497: 1496: 1480: 1478: 1477: 1472: 1467: 1459: 1458: 1446: 1445: 1430: 1429: 1411: 1410: 1394: 1392: 1391: 1386: 1381: 1370: 1369: 1353: 1351: 1350: 1345: 1340: 1339: 1327: 1326: 1314: 1309: 1308: 1299: 1278: 1276: 1275: 1270: 1268: 1267: 1251: 1249: 1248: 1243: 1241: 1240: 1224: 1222: 1221: 1216: 1214: 1213: 1201: 1200: 1184: 1182: 1181: 1176: 1164: 1162: 1161: 1156: 1154: 1153: 1137: 1135: 1134: 1129: 1127: 1126: 1103: 1101: 1100: 1095: 1083: 1081: 1080: 1075: 1046: 1044: 1043: 1038: 1036: 1034: 1030: 1027: 1025: 1020: 1017: 1005: 1001: 998: 996: 978: 967: 966: 950: 948: 947: 942: 921: 919: 918: 913: 901: 899: 898: 893: 888: 886: 869: 838: 836: 835: 830: 798: 796: 795: 790: 778: 776: 775: 770: 762: 757: 756: 737: 735: 734: 729: 717: 715: 714: 709: 692: 691: 674:Carnot's theorem 671: 669: 668: 663: 642: 640: 639: 634: 622: 620: 619: 614: 602: 600: 599: 594: 589: 543: 539: 537: 531: 527: 523: 451: 449: 448: 445: 442: 340: 338: 335: 317: 315: 312: 229: 223: 215: 207: 201: 193: 185: 179: 173: 153: 139: 137: 136: 133: 130: 122: 120: 117: 110: 44: 32: 5154: 5153: 5149: 5148: 5147: 5145: 5144: 5143: 5104: 5103: 5102: 5097: 5061: 4995: 4939: 4913: 4908: 4878: 4873: 4855: 4836:Metric prefixes 4819: 4741: 4623: 4616: 4568: 4563: 4533: 4528: 4515: 4452: 4443: 4406: 4404: 4394: 4386: 4384: 4370: 4367: 4352: 4344: 4342: 4338: 4333: 4330: 4325: 4324: 4315: 4313: 4309: 4303: 4292: 4285: 4284: 4280: 4273: 4258: 4257: 4253: 4240: 4239: 4235: 4223: 4217: 4216: 4212: 4203: 4201: 4193: 4192: 4188: 4171: 4170: 4166: 4113: 4112: 4108: 4099: 4097: 4093: 4082: 4078: 4077: 4073: 4037: 4015: 4014: 4007: 3998: 3996: 3991: 3990: 3983: 3974: 3972: 3959: 3958: 3954: 3945:on 2015-10-13. 3942: 3931: 3926: 3925: 3921: 3912: 3910: 3906: 3895: 3891: 3890: 3886: 3877: 3875: 3871: 3860: 3855: 3854: 3847: 3838: 3836: 3823: 3822: 3818: 3809: 3807: 3802: 3801: 3797: 3788: 3786: 3773: 3772: 3768: 3759: 3757: 3752: 3751: 3747: 3740: 3733: 3726: 3705: 3670: 3668: 3666: 3634: 3633: 3629: 3620: 3618: 3605: 3604: 3600: 3591: 3589: 3584: 3583: 3576: 3567: 3565: 3552: 3551: 3547: 3538: 3536: 3531: 3530: 3526: 3517: 3515: 3510: 3509: 3505: 3463: 3462: 3455: 3414: 3413: 3409: 3401: 3397: 3389: 3385: 3378: 3365: 3364: 3360: 3352: 3348: 3340: 3336: 3328: 3324: 3270: 3269: 3265: 3257: 3253: 3245: 3241: 3233: 3229: 3221: 3217: 3209: 3205: 3197: 3193: 3185: 3181: 3173: 3169: 3161: 3154: 3146: 3142: 3134: 3130: 3122: 3118: 3106: 3105: 3098: 3090: 3086: 3065: 3064: 3060: 3046: 3045: 3041: 3027: 3026: 3022: 3013: 3011: 3002: 3001: 2997: 2988: 2986: 2978: 2974: 2973: 2969: 2960: 2958: 2948: 2947: 2943: 2935: 2928: 2919: 2917: 2908: 2907: 2896: 2887: 2885: 2876: 2875: 2862: 2853: 2851: 2846: 2845: 2841: 2832: 2830: 2825: 2824: 2809: 2800: 2798: 2789: 2788: 2777: 2772: 2767: 2766: 2759: 2752: 2750: 2748: 2746: 2742: 2737: 2698: 2691: 2688: 2679: 2676: 2671: 2670: 2666: 2663: 2658: 2657: 2653: 2650: 2645: 2644: 2636: 2633: 2628: 2627: 2619: 2616: 2611: 2610: 2594: 2299: 2293: 2238: 2232: 2207: 2180: 2176: 2172: 2161: 2155: 2139: 2123: 2117: 2115: 2109: 2105: 2102: 2100: 2083: 2077: 2074: 2070: 2063: 2059: 2058: 2057: 2055: 2054: 2046: 2043: 2040: 2037: 2034: 2032: 2031: 2028: 2023: 2021: 2020: 2019: 2017: 2016: 2007: 2000: 1997: 1992: 1984: 1978: 1977: 1976: 1974: 1973: 1964: 1961: 1958: 1956: 1950: 1947: 1944: 1942: 1940: 1937: 1931: 1928: 1926: 1925: 1924: 1922: 1921: 1903: 1900: 1898: 1895: 1889: 1879: 1876: 1874: 1871: 1865: 1840: 1836:Planck constant 1832: 1825: 1816: 1796: 1790: 1783: 1777: 1746: 1743: 1740: 1739: 1737: 1660: 1609: 1594: 1581: 1566: 1561: 1560: 1536: 1523: 1501: 1488: 1483: 1482: 1481:. By supposing 1450: 1437: 1421: 1402: 1397: 1396: 1361: 1356: 1355: 1331: 1318: 1300: 1281: 1280: 1259: 1254: 1253: 1232: 1227: 1226: 1205: 1192: 1187: 1186: 1167: 1166: 1145: 1140: 1139: 1118: 1113: 1112: 1086: 1085: 1066: 1065: 1062: 1006: 979: 958: 953: 952: 933: 932: 904: 903: 873: 845: 844: 812: 811: 781: 780: 748: 740: 739: 720: 719: 718:of temperature 683: 678: 677: 645: 644: 625: 624: 605: 604: 550: 549: 541: 535: 533: 529: 525: 521: 498: 482: 464:(unpublished), 462:Jacques Charles 458: 446: 443: 440: 439: 437: 428:is 100 Â°C. 358: 353: 347: 336: 333: 331: 313: 310: 308: 288:. The Celsius, 225: 221: 213: 203: 199: 191: 181: 177: 171: 149: 134: 131: 126: 125: 123: 118: 115: 113: 109: 103: 99:2019 definition 51: 28: 17: 12: 11: 5: 5152: 5150: 5142: 5141: 5136: 5131: 5126: 5121: 5116: 5106: 5105: 5099: 5098: 5096: 5095: 5090: 5085: 5080: 5075: 5069: 5067: 5063: 5062: 5060: 5059: 5054: 5049: 5044: 5039: 5034: 5029: 5024: 5019: 5014: 5003: 5001: 4997: 4996: 4994: 4993: 4988: 4983: 4978: 4973: 4968: 4963: 4958: 4953: 4947: 4945: 4941: 4940: 4938: 4937: 4932: 4927: 4921: 4919: 4915: 4914: 4909: 4907: 4906: 4899: 4892: 4884: 4875: 4874: 4872: 4871: 4860: 4857: 4856: 4854: 4853: 4848: 4843: 4838: 4833: 4827: 4825: 4821: 4820: 4818: 4817: 4812: 4807: 4802: 4797: 4792: 4787: 4782: 4777: 4772: 4767: 4762: 4757: 4751: 4749: 4743: 4742: 4740: 4739: 4734: 4729: 4724: 4719: 4714: 4709: 4704: 4699: 4694: 4689: 4684: 4679: 4674: 4669: 4664: 4659: 4654: 4649: 4644: 4642:degree Celsius 4639: 4634: 4628: 4626: 4622:Derived units 4618: 4617: 4615: 4614: 4609: 4604: 4599: 4594: 4589: 4584: 4578: 4576: 4570: 4569: 4564: 4562: 4561: 4554: 4547: 4539: 4530: 4529: 4520: 4517: 4516: 4514: 4513: 4508: 4503: 4498: 4493: 4488: 4483: 4478: 4473: 4468: 4463: 4457: 4454: 4453: 4444: 4442: 4441: 4434: 4427: 4419: 4413: 4412: 4392: 4366: 4365:External links 4363: 4362: 4361: 4350: 4329: 4326: 4323: 4322: 4301: 4278: 4271: 4251: 4233: 4210: 4186: 4179:, 2016-01-28, 4164: 4106: 4071: 4048:(1): L13–L16. 4035: 4005: 3981: 3952: 3919: 3884: 3845: 3816: 3795: 3766: 3745: 3738: 3731: 3724: 3698:StĂ€bchensehens 3664: 3627: 3598: 3574: 3545: 3524: 3503: 3453: 3407: 3405:, p. 236. 3395: 3393:, p. 235. 3383: 3376: 3358: 3356:, p. 234. 3346: 3334: 3322: 3263: 3251: 3249:, p. 388. 3239: 3237:, p. 213. 3227: 3215: 3213:, p. 192. 3203: 3201:, p. 186. 3191: 3189:, p. 212. 3179: 3177:, p. 193. 3167: 3165:, p. 106. 3152: 3150:, p. 187. 3140: 3138:, p. 104. 3128: 3116: 3113:. p. 237. 3096: 3084: 3058: 3039: 3020: 2995: 2967: 2941: 2926: 2894: 2860: 2839: 2807: 2774: 2773: 2771: 2768: 2765: 2764: 2739: 2738: 2736: 2733: 2732: 2731: 2726: 2721: 2715: 2710: 2704: 2703: 2687: 2684: 2609:at code point 2593: 2590: 2587: 2586: 2583: 2580: 2577: 2574: 2571: 2567: 2566: 2563: 2560: 2557: 2554: 2551: 2547: 2546: 2543: 2540: 2537: 2534: 2531: 2527: 2526: 2523: 2520: 2517: 2514: 2511: 2507: 2506: 2503: 2500: 2497: 2494: 2491: 2487: 2486: 2483: 2480: 2477: 2474: 2471: 2467: 2466: 2463: 2460: 2457: 2454: 2451: 2447: 2446: 2443: 2440: 2437: 2434: 2431: 2427: 2426: 2423: 2420: 2417: 2414: 2411: 2407: 2406: 2403: 2400: 2397: 2394: 2391: 2387: 2386: 2383: 2380: 2377: 2374: 2371: 2367: 2366: 2363: 2360: 2357: 2354: 2351: 2347: 2346: 2343: 2340: 2337: 2334: 2331: 2327: 2326: 2323: 2295:Main article: 2292: 2289: 2234:Main article: 2231: 2228: 2154: 2151: 2138: 2137:Practical uses 2135: 2092: 2091: 2081: 2068: 2005: 1990: 1893: 1886:larger program 1869: 1860:such that the 1830: 1812:speed of light 1794: 1779:Main article: 1776: 1773: 1672:critical point 1659: 1656: 1647: 1646: 1642: 1631:ideal gas laws 1616: 1612: 1607: 1601: 1597: 1593: 1588: 1584: 1579: 1573: 1569: 1548: 1543: 1539: 1535: 1530: 1526: 1522: 1519: 1516: 1513: 1508: 1504: 1500: 1495: 1491: 1470: 1466: 1462: 1457: 1453: 1449: 1444: 1440: 1436: 1433: 1428: 1424: 1420: 1417: 1414: 1409: 1405: 1384: 1380: 1376: 1373: 1368: 1364: 1343: 1338: 1334: 1330: 1325: 1321: 1317: 1313: 1307: 1303: 1298: 1294: 1291: 1288: 1266: 1262: 1239: 1235: 1212: 1208: 1204: 1199: 1195: 1174: 1152: 1148: 1125: 1121: 1111:engine, where 1093: 1073: 1061: 1058: 1033: 1024: 1015: 1012: 1009: 1004: 995: 991: 988: 985: 982: 976: 973: 970: 965: 961: 940: 911: 891: 885: 882: 879: 876: 872: 867: 864: 861: 858: 855: 852: 828: 825: 822: 819: 788: 768: 765: 761: 755: 751: 747: 727: 707: 704: 701: 698: 695: 690: 686: 661: 658: 655: 652: 632: 612: 592: 588: 584: 581: 578: 575: 572: 569: 566: 563: 560: 557: 497: 494: 481: 478: 457: 454: 430: 429: 422: 419:freezing point 386:thermodynamics 357: 354: 346: 343: 328:thermal energy 232: 231: 219: 210: 209: 197: 188: 187: 175: 168: 167: 164: 163: 158: 146: 145: 141: 140: 107: 100: 96: 95: 90: 86: 85: 82: 78: 77: 74: 70: 69: 64: 58: 57: 53: 52: 45: 37: 36: 15: 13: 10: 9: 6: 4: 3: 2: 5151: 5140: 5137: 5135: 5132: 5130: 5127: 5125: 5124:SI base units 5122: 5120: 5117: 5115: 5112: 5111: 5109: 5094: 5091: 5089: 5086: 5084: 5081: 5079: 5076: 5074: 5071: 5070: 5068: 5064: 5058: 5055: 5053: 5050: 5048: 5045: 5043: 5040: 5038: 5035: 5033: 5030: 5028: 5025: 5023: 5020: 5018: 5015: 5012: 5008: 5005: 5004: 5002: 4998: 4992: 4989: 4987: 4984: 4982: 4979: 4977: 4974: 4972: 4969: 4967: 4964: 4962: 4959: 4957: 4954: 4952: 4949: 4948: 4946: 4942: 4936: 4933: 4931: 4928: 4926: 4923: 4922: 4920: 4916: 4912: 4905: 4900: 4898: 4893: 4891: 4886: 4885: 4882: 4870: 4862: 4861: 4858: 4852: 4849: 4847: 4844: 4842: 4839: 4837: 4834: 4832: 4829: 4828: 4826: 4822: 4816: 4813: 4811: 4808: 4806: 4803: 4801: 4798: 4796: 4793: 4791: 4788: 4786: 4783: 4781: 4778: 4776: 4775:degree of arc 4773: 4771: 4768: 4766: 4763: 4761: 4758: 4756: 4753: 4752: 4750: 4748: 4744: 4738: 4735: 4733: 4730: 4728: 4725: 4723: 4720: 4718: 4715: 4713: 4710: 4708: 4705: 4703: 4700: 4698: 4695: 4693: 4690: 4688: 4685: 4683: 4680: 4678: 4675: 4673: 4670: 4668: 4665: 4663: 4660: 4658: 4655: 4653: 4650: 4648: 4645: 4643: 4640: 4638: 4635: 4633: 4630: 4629: 4627: 4625: 4619: 4613: 4610: 4608: 4605: 4603: 4600: 4598: 4595: 4593: 4590: 4588: 4585: 4583: 4580: 4579: 4577: 4575: 4571: 4567: 4560: 4555: 4553: 4548: 4546: 4541: 4540: 4537: 4527: 4523: 4518: 4512: 4509: 4507: 4504: 4502: 4499: 4497: 4494: 4492: 4489: 4487: 4484: 4482: 4479: 4477: 4474: 4472: 4469: 4467: 4464: 4462: 4459: 4458: 4455: 4451: 4447: 4440: 4435: 4433: 4428: 4426: 4421: 4420: 4417: 4402: 4398: 4393: 4383:on 2008-02-01 4382: 4378: 4374: 4369: 4368: 4364: 4358: 4357: 4351: 4337: 4332: 4331: 4327: 4308: 4304: 4298: 4291: 4290: 4282: 4279: 4274: 4268: 4264: 4263: 4255: 4252: 4248:. 2010-01-13. 4247: 4243: 4237: 4234: 4229: 4222: 4221: 4214: 4211: 4200: 4196: 4190: 4187: 4183: 4178: 4174: 4168: 4165: 4160: 4156: 4151: 4146: 4142: 4138: 4134: 4130: 4127:(2): R1–R20. 4126: 4122: 4118: 4110: 4107: 4096:on 2008-11-23 4092: 4088: 4081: 4075: 4072: 4066: 4061: 4056: 4051: 4047: 4043: 4039: 4034: 4030: 4026: 4022: 4012: 4010: 4006: 3994: 3988: 3986: 3982: 3970: 3966: 3962: 3956: 3953: 3949: 3941: 3937: 3930: 3923: 3920: 3909:on 2012-02-09 3905: 3901: 3894: 3888: 3885: 3874:on 2011-01-10 3870: 3866: 3859: 3852: 3850: 3846: 3835:on 2007-09-26 3834: 3830: 3826: 3820: 3817: 3805: 3799: 3796: 3785:on 2007-06-15 3784: 3780: 3776: 3770: 3767: 3755: 3749: 3746: 3742: 3737: 3730: 3723: 3719: 3715: 3709: 3704: 3701:1940 von der 3699: 3695: 3691: 3687: 3683: 3679: 3667: 3661: 3657: 3653: 3649: 3645: 3641: 3637: 3631: 3628: 3617:on 2007-04-21 3616: 3612: 3608: 3602: 3599: 3587: 3581: 3579: 3575: 3564:on 2007-06-23 3563: 3559: 3555: 3549: 3546: 3534: 3528: 3525: 3513: 3507: 3504: 3499: 3495: 3491: 3487: 3483: 3479: 3475: 3471: 3467: 3460: 3458: 3454: 3450: 3448: 3442: 3438: 3434: 3430: 3426: 3422: 3418: 3411: 3408: 3404: 3399: 3396: 3392: 3387: 3384: 3379: 3377:9783030057466 3373: 3369: 3362: 3359: 3355: 3350: 3347: 3343: 3338: 3335: 3331: 3326: 3323: 3318: 3314: 3309: 3304: 3299: 3294: 3290: 3286: 3282: 3278: 3274: 3267: 3264: 3260: 3255: 3252: 3248: 3243: 3240: 3236: 3231: 3228: 3224: 3219: 3216: 3212: 3207: 3204: 3200: 3195: 3192: 3188: 3183: 3180: 3176: 3171: 3168: 3164: 3159: 3157: 3153: 3149: 3144: 3141: 3137: 3132: 3129: 3125: 3120: 3117: 3112: 3111: 3103: 3101: 3097: 3093: 3088: 3085: 3082: 3076: 3072: 3068: 3062: 3059: 3054: 3050: 3043: 3040: 3035: 3031: 3024: 3021: 3009: 3005: 2999: 2996: 2984: 2977: 2971: 2968: 2956: 2952: 2945: 2942: 2938: 2933: 2931: 2927: 2915: 2911: 2905: 2903: 2901: 2899: 2895: 2883: 2879: 2873: 2871: 2869: 2867: 2865: 2861: 2849: 2843: 2840: 2828: 2822: 2820: 2818: 2816: 2814: 2812: 2808: 2797: 2793: 2786: 2784: 2782: 2780: 2776: 2769: 2744: 2741: 2734: 2730: 2727: 2725: 2722: 2719: 2716: 2714: 2711: 2709: 2706: 2705: 2701: 2700:Energy portal 2695: 2690: 2685: 2683: 2680:ANGSTROM SIGN 2642: 2625: 2608: 2603: 2601: 2600: 2591: 2585:quettakelvin 2584: 2581: 2578: 2576:quectokelvin 2575: 2572: 2569: 2568: 2564: 2561: 2558: 2555: 2552: 2549: 2548: 2544: 2541: 2538: 2535: 2532: 2529: 2528: 2524: 2521: 2518: 2515: 2512: 2509: 2508: 2504: 2501: 2498: 2495: 2492: 2489: 2488: 2484: 2481: 2478: 2475: 2472: 2469: 2468: 2464: 2461: 2458: 2455: 2452: 2449: 2448: 2444: 2441: 2438: 2435: 2432: 2429: 2428: 2424: 2421: 2418: 2415: 2412: 2409: 2408: 2404: 2401: 2398: 2395: 2392: 2389: 2388: 2384: 2381: 2378: 2375: 2372: 2369: 2368: 2364: 2361: 2358: 2355: 2352: 2349: 2348: 2328: 2322:Submultiples 2320: 2314: 2312: 2308: 2307:metric prefix 2304: 2298: 2290: 2288: 2286: 2282: 2278: 2274: 2270: 2268: 2263: 2259: 2255: 2251: 2247: 2243: 2237: 2229: 2227: 2225: 2219: 2217: 2215: 2213: 2211: 2205: 2201: 2197: 2193: 2189: 2184: 2170: 2166: 2160: 2152: 2147: 2143: 2136: 2134: 2132: 2127: 2097: 2080: 2067: 2062: 2008: 2004: 1993: 1989: 1983: 1982: 1919: 1918: 1917: 1915: 1909: 1897: =  1892: 1887: 1868: 1863: 1859: 1855: 1854:SI base units 1851: 1848:In 2005, the 1843: 1837: 1829: 1823: 1819: 1813: 1809: 1805: 1801: 1793: 1787: 1782: 1774: 1772: 1770: 1766: 1760: 1758: 1753: 1733: 1731: 1726: 1723: 1719: 1718:melting point 1714: 1712: 1707: 1706:boiling point 1703: 1699: 1695: 1691: 1690: 1685: 1677: 1673: 1669: 1668:phase diagram 1664: 1657: 1655: 1653: 1643: 1641:respectively. 1639: 1638: 1637: 1634: 1632: 1614: 1610: 1605: 1599: 1595: 1591: 1586: 1582: 1577: 1571: 1567: 1541: 1537: 1533: 1528: 1524: 1517: 1514: 1511: 1506: 1502: 1498: 1493: 1489: 1468: 1464: 1455: 1451: 1447: 1442: 1438: 1431: 1426: 1422: 1418: 1415: 1412: 1407: 1403: 1382: 1378: 1374: 1371: 1366: 1362: 1336: 1332: 1328: 1323: 1319: 1311: 1305: 1301: 1296: 1292: 1289: 1286: 1264: 1260: 1237: 1233: 1210: 1206: 1202: 1197: 1193: 1172: 1150: 1146: 1123: 1119: 1110: 1105: 1091: 1071: 1059: 1057: 1055: 1051: 1050:absolute zero 1022: 1010: 1007: 993: 989: 983: 980: 974: 971: 968: 963: 959: 938: 930: 925: 909: 889: 883: 880: 877: 874: 870: 865: 862: 856: 850: 842: 823: 817: 804: 800: 786: 766: 763: 759: 753: 749: 745: 725: 702: 696: 693: 688: 684: 675: 656: 650: 630: 610: 590: 586: 579: 576: 573: 570: 561: 555: 547: 518: 515: 511: 507: 503: 495: 490: 486: 479: 477: 475: 474:Charles's law 471: 467: 463: 456:Charles's law 453: 435: 427: 426:boiling point 423: 421:is 0 Â°C. 420: 416: 415: 414: 412: 408: 404: 403:RĂ©aumur scale 400: 395: 391: 390:atomic theory 387: 383: 379: 371: 367: 362: 355: 352: 344: 342: 329: 325: 321: 307: 303: 299: 295: 291: 287: 282: 277: 274: 270: 269:absolute zero 266: 263: 259: 255: 251: 247: 243: 239: 228: 220: 218: 211: 206: 198: 196: 189: 184: 176: 169: 165: 162: 159: 157: 152: 148: 142: 129: 111: 106: 101: 97: 94: 91: 87: 83: 79: 75: 71: 68: 65: 63: 59: 54: 49: 43: 38: 33: 30: 26: 22: 4970: 4780:electronvolt 4591: 4480: 4405:. Retrieved 4401:zapatopi.net 4400: 4385:. Retrieved 4381:the original 4377:zapatopi.net 4376: 4355: 4343:. Retrieved 4328:Bibliography 4314:. Retrieved 4288: 4281: 4261: 4254: 4245: 4236: 4219: 4213: 4202:. Retrieved 4198: 4189: 4180: 4176: 4167: 4124: 4120: 4109: 4098:. Retrieved 4091:the original 4074: 4045: 4041: 4032: 4028: 4024: 4020: 3997:. Retrieved 3973:. Retrieved 3964: 3955: 3946: 3940:the original 3922: 3911:. Retrieved 3904:the original 3887: 3876:. Retrieved 3869:the original 3864: 3837:. Retrieved 3833:the original 3828: 3819: 3808:. Retrieved 3798: 3787:. Retrieved 3783:the original 3778: 3769: 3758:. Retrieved 3748: 3735: 3728: 3721: 3717: 3675: 3669:. Retrieved 3643: 3630: 3619:. Retrieved 3615:the original 3610: 3601: 3590:. Retrieved 3566:. Retrieved 3562:the original 3557: 3548: 3537:. Retrieved 3527: 3516:. Retrieved 3506: 3473: 3469: 3447:triple point 3446: 3444: 3424: 3420: 3410: 3403:Thomson 1882 3398: 3391:Thomson 1882 3386: 3367: 3361: 3354:Thomson 1882 3349: 3342:Thomson 1882 3337: 3330:Thomson 1882 3325: 3280: 3276: 3266: 3259:Thomson 1882 3254: 3247:Thomson 1882 3242: 3235:Thomson 1882 3230: 3223:Thomson 1882 3218: 3211:Thomson 1882 3206: 3199:Thomson 1882 3194: 3187:Thomson 1882 3182: 3175:Thomson 1882 3170: 3163:Thomson 1882 3148:Thomson 1882 3143: 3136:Thomson 1882 3131: 3124:Thomson 1882 3119: 3109: 3092:Thomson 1882 3087: 3074: 3070: 3061: 3052: 3042: 3033: 3023: 3012:. Retrieved 3010:. 2018-05-14 3007: 2998: 2987:. Retrieved 2982: 2970: 2959:. Retrieved 2954: 2944: 2936: 2918:. Retrieved 2916:. 2018-05-14 2913: 2886:. Retrieved 2884:. 2018-05-12 2881: 2852:. Retrieved 2842: 2831:. Retrieved 2799:. Retrieved 2795: 2760:0.10 mK 2743: 2604: 2598: 2595: 2565:ronnakelvin 2556:rontokelvin 2545:yottakelvin 2536:yoctokelvin 2525:zettakelvin 2516:zeptokelvin 2476:femtokelvin 2416:microkelvin 2396:millikelvin 2385:hectokelvin 2376:centikelvin 2300: 2266: 2239: 2236:Noise figure 2220: 2185: 2162: 2128: 2093: 2078: 2065: 2060: 2002: 1987: 1980: 1910: 1890: 1866: 1847: 1839: 1827: 1815: 1804:derived unit 1791: 1761: 1754: 1734: 1727: 1715: 1689:triple point 1687: 1681: 1648: 1635: 1109:Carnot cycle 1106: 1063: 809: 519: 509: 499: 459: 431: 399:Newton scale 388:, including 375: 370:thermometers 305: 278: 258:Kelvin scale 257: 241: 237: 235: 226: 204: 182: 160: 155: 150: 104: 73:Unit of 29: 5078:statcoulomb 4450:temperature 4177:NIST SP 811 3948:conclusion. 3706: [ 2718:kT (energy) 2667:KELVIN SIGN 2620:KELVIN SIGN 2592:Orthography 2496:attokelvin 2485:petakelvin 2465:terakelvin 2456:picokelvin 2445:gigakelvin 2436:nanokelvin 2425:megakelvin 2405:kilokelvin 2365:decakelvin 2356:decikelvin 2311:power of 10 2252:, i.e. the 2250:noise floor 2242:electronics 2208:5772 K 2181:5600 K 2177:7500 K 2173:4000 K 2112:10 J/K 1906:10 J⋅K 1882:10 J/K 1722:fluctuating 506:Lord Kelvin 489:Lord Kelvin 480:Lord Kelvin 466:John Dalton 366:calibration 281:Lord Kelvin 250:temperature 202:(1.8  89:Named after 76:temperature 62:Unit system 21:Lord Kelvin 5108:Categories 5073:statampere 4925:centimetre 4918:Base units 4574:Base units 4526:comparison 4471:Fahrenheit 4407:2024-05-05 4387:2022-02-21 4345:2022-04-28 4316:2015-09-06 4204:2023-08-21 4121:Metrologia 4100:2010-02-23 4042:Metrologia 3999:2022-02-21 3975:2024-05-18 3971:. May 2024 3913:2011-10-25 3878:2011-01-01 3839:2008-02-06 3810:2022-02-21 3789:2008-02-06 3760:2022-02-21 3671:2023-03-16 3621:2008-02-06 3592:2022-02-21 3568:2008-02-06 3539:2022-02-21 3518:2022-02-21 3476:(9): 541. 3014:2022-02-21 2989:2022-02-21 2961:2022-02-21 2920:2022-09-02 2888:2022-02-21 2854:2022-03-05 2833:2022-09-07 2801:2022-02-18 2770:References 2579:10 K 2570:10 K 2559:10 K 2550:10 K 2539:10 K 2530:10 K 2519:10 K 2510:10 K 2505:exakelvin 2499:10 K 2490:10 K 2479:10 K 2470:10 K 2459:10 K 2450:10 K 2439:10 K 2430:10 K 2419:10 K 2410:10 K 2399:10 K 2390:10 K 2379:10 K 2370:10 K 2359:10 K 2350:10 K 2342:SI symbol 2333:SI symbol 2325:Multiples 2283:using the 2273:capacitors 2169:black body 2157:See also: 1834:) and the 1798:) and the 1666:A typical 738:such that 382:Fahrenheit 368:point for 356:Precursors 349:See also: 290:Fahrenheit 256:(SI). The 224:1.8  195:Fahrenheit 50: (°F) 48:Fahrenheit 5017:abcoulomb 4911:CGS units 4717:steradian 4632:becquerel 3498:0021-9584 3441:0370-1662 2755:10 K 2749:273.16 × 2301:The only 2262:resistors 2188:astronomy 1534:− 1518:× 1499:− 1448:− 1432:× 1419:× 1383:μ 1329:− 1287:μ 1203:− 1072:μ 1011:⁡ 984:⁡ 975:× 851:μ 818:μ 787:μ 651:μ 556:μ 339:10 J 246:base unit 244:) is the 240:(symbol: 230: Â°Ra 5093:statvolt 5007:abampere 4869:Category 4824:See also 4597:kilogram 4566:SI units 4511:Wedgwood 4476:Gas mark 4307:Archived 4286:"22.2". 4159:31080297 3638:(1952). 3317:33285852 2983:nist.gov 2796:BIPM.org 2686:See also 2677:Å 2664:K 2654:OHM SIGN 2651:Ω 2617:K 1694:pressure 1054:infinity 603:, where 502:ennobled 434:pressure 424:Water's 417:Water's 392:and the 262:absolute 154: K 5088:statohm 5083:statmho 5057:oersted 5052:maxwell 5047:gilbert 5022:abhenry 4785:hectare 4770:decibel 4712:sievert 4707:siemens 4637:coulomb 4587:candela 4501:RĂ©aumur 4496:Rankine 4466:Delisle 4461:Celsius 4150:6508687 4129:Bibcode 4050:Bibcode 3690:Platins 3478:Bibcode 3429:Bibcode 3308:7516509 3285:Bibcode 3277:Entropy 2607:Unicode 2281:circuit 2086:⁠ 2056:⁠ 2052:⁠ 2018:⁠ 2011:⁠ 1975:⁠ 1971:⁠ 1923:⁠ 1820:), the 1810:of the 1750:⁠ 1738:⁠ 1652:Celsius 450:⁠ 438:⁠ 409:to the 345:History 306:exactly 294:Rankine 273:Celsius 252:in the 217:Rankine 174:Celsius 138:⁠ 124:⁠ 5037:abvolt 4981:kayser 4971:kelvin 4935:second 4800:minute 4760:dalton 4702:radian 4697:pascal 4687:newton 4612:second 4592:kelvin 4582:ampere 4491:Newton 4486:Leiden 4481:Kelvin 4446:Scales 4299:  4269:  4157:  4147:  4031:, and 3995:. BIPM 3806:. BIPM 3756:. BIPM 3696:- und 3694:Zapfen 3662:  3588:. BIPM 3535:. BIPM 3514:. BIPM 3496:  3439:  3427:: 28. 3374:  3315:  3305:  2985:. NIST 2850:. BIPM 2829:. BIPM 2674: 2672:U+212B 2669:, and 2661: 2659:U+212A 2648: 2646:U+2126 2634:K 2631: 2629:U+004B 2614: 2612:U+212A 2599:degree 2339:Value 2330:Value 2256:. 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Index

Lord Kelvin
Kelvin (disambiguation)

Fahrenheit
Unit system
SI
William Thomson, 1st Baron Kelvin
kB
J
Fahrenheit
Rankine
base unit
temperature
International System of Units
absolute
temperature scale
absolute zero
Celsius
Lord Kelvin
triple point of water
Fahrenheit
Rankine
2019 revision of the SI
Boltzmann constant
joules
thermodynamic temperature
thermal energy
Thermodynamic temperature § History

calibration

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