# Test volume method

Revision as of 11:53, 7 February 2008 by Dduque (talk | contribs) (New page: An alternative to the virial pressure route to calculating the pressure, there is a method which consists on evaluating the change in internal energy, <math>\Delta U</math> produce...)

An alternative to the virial pressure route to calculating the pressure, there is a method which consists on evaluating the change in internal energy, produced by a small change in the volume of the system . It can be shown that

where is the Boltzmann constant and is the temperature.

The method is clearly inspired by the Widom test-particle method to obtain the chemical potential.