Temperature: Difference between revisions
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:<math>T = \frac{pV}{Nk_B}</math> | :<math>T = \frac{pV}{Nk_B}</math> | ||
having the SI units of ''Kelvin'' (named in honour of [[William Thomson]]). | having the SI units of ''Kelvin'' (named in honour of [[William Thomson]]). Perhaps a better definition of temperature is | ||
:<math>\frac{1}{T(E,V,N)} = \left. \frac{\partial S}{\partial E}\right\vert_{V,N}</math> | :<math>\frac{1}{T(E,V,N)} = \left. \frac{\partial S}{\partial E}\right\vert_{V,N}</math> | ||
==Kinetic temperature== | ==Kinetic temperature== | ||
Revision as of 13:31, 12 February 2008
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The temperature of a system in classical thermodynamics is intimately related to the zeroth law of thermodynamics; two systems having to have the same temperature if they are to be in thermal equilibrium (i.e. there is no net heat flow between them).
However, it is most useful to have a temperature scale.
By making use of the ideal gas law one can define an absolute temperature
having the SI units of Kelvin (named in honour of William Thomson). Perhaps a better definition of temperature is
Kinetic temperature
Configurational temperature
Non-equilibrium temperature
References
- William Thomson "On an Absolute Thermometric Scale, founded on Carnot's Theory of the Motive Power of Heat, and calculated from the Results of Regnault's Experiments on the Pressure and Latent Heat of Steam", Philosophical Magazine October pp. (1848)