# Chemical potential for van de Waarls gas

1. Apr 1, 2014

### Dassinia

Hello,
In my book, we have two equations to find the chemical potential
µj=(dF/dNj) T, V and N constants

and

µj=-kT ln (ζj/Nj)

We calculated the potential of a Van der Waals gas using each of these equations, but the result is not the same, i want to understand why ?

2. Apr 2, 2014