Difference between revisions of "Joule-Thomson effect"

From SklogWiki
Jump to: navigation, search
(New page: The Joule-Thomson coefficient is given by :<math>\mu_{\mathrm JT} = \left. \frac{\partial T}{\partial p} \right\vert_H</math> where ''T'' is the temperature, ''p'' is the [[pressure...)
 
Line 1: Line 1:
 +
The '''Joule-Thomson effect''' is also known as the ''Joule-Kelvin effect''.
 +
==Joule-Thomson coefficient==
 
The Joule-Thomson coefficient is given by  
 
The Joule-Thomson coefficient is given by  
  

Revision as of 12:09, 12 July 2007

The Joule-Thomson effect is also known as the Joule-Kelvin effect.

Joule-Thomson coefficient

The Joule-Thomson coefficient is given by

\mu_{\mathrm JT} = \left. \frac{\partial T}{\partial p} \right\vert_H

where T is the temperature, p is the pressure and H is the enthalpy.

In terms of heat capacities one has

\mu_{\mathrm JT} C_V = -\left. \frac{\partial E}{\partial V} \right\vert_T

and

\mu_{\mathrm JT} C_p = -\left. \frac{\partial H}{\partial p} \right\vert_T


In terms of the second virial coefficient one has

\mu_{\mathrm JT} = B_2 -T \frac{dB_2}{dT}

References

  1. Thomas R. Rybolt "A virial treatment of the Joule and Joule-Thomson coefficients", Journal of Chemical Education 58 pp. 620-624 (1981)