# Joule-Thomson effect

Revision as of 12:09, 12 July 2007 by Carl McBride (talk | contribs)

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

## Joule-Thomson coefficient

The Joule-Thomson coefficient is given by

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

In terms of heat capacities one has

and

In terms of the second virial coefficient one has