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The '''Joule-Thomson effect''' is also known as the ''Joule-Kelvin effect''. This effect is present in non ideal gasses, where a change in temperature occurs upon expansion.
The '''Joule-Thomson effect''' is also known as the ''Joule-Kelvin effect''.
==Joule-Thomson coefficient==
==Joule-Thomson coefficient==
The Joule-Thomson coefficient is given by  
The Joule-Thomson coefficient is given by  
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In terms of the [[second virial coefficient]] at zero [[pressure]] one has
In terms of the [[second virial coefficient]] at zero [[pressure]] one has


:<math>\mu_{\mathrm JT}\vert_{p=0} = ^0\!\!\phi = B_2(T) -T \frac{dB_2(T)}{dT}</math>
:<math>\mu_{\mathrm JT} = B_2 -T \frac{dB_2}{dT}</math>
==Inversion temperature==
<ref>[http://dx.doi.org/10.1119/1.17417 Jacques-Olivier Goussard and Bernard Roulet "Free expansion for real gases", American Journal of Physics '''61''' pp.  845-848 (1993)]</ref>
<ref>[http://dx.doi.org/10.2174/1874396X00903010017 E. Albarran-Zavala, B. A. Espinoza-Elizarraraz, F. Angulo-Brown "Joule Inversion Temperatures for Some Simple Real Gases", The Open Thermodynamics Journal '''3''' pp. 17-22 (2009)]</ref>
 
==References==
==References==
<references/>
#[http://jchemed.chem.wisc.edu/Journal/Issues/1981/Aug/jceSubscriber/JCE1981p0620.pdf Thomas R. Rybolt "A virial treatment of the Joule and Joule-Thomson coefficients", Journal of Chemical Education '''58''' pp. 620-624 (1981)]
'''Related reading'''
*[http://jchemed.chem.wisc.edu/Journal/Issues/1981/Aug/jceSubscriber/JCE1981p0620.pdf Thomas R. Rybolt "A virial treatment of the Joule and Joule-Thomson coefficients", Journal of Chemical Education '''58''' pp. 620-624 (1981)]
[[category: classical thermodynamics]]
[[category: classical thermodynamics]]
[[category: statistical mechanics]]
[[category: statistical mechanics]]
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