# Homework Help: Molar Entropy Of A Gas

1. Apr 21, 2010

### leviathanX777

1. The problem statement, all variables and given/known data
Show that the molar entropy of a gas is given by;

2. Relevant equations

3. The attempt at a solution

I've tried this numerous times. The first part of the question involved getting ln Z for the hemholtz free energy which was found to be;

The 3/2 is a power. I have tried this numerous times and still unable to get the result mentioned.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Apr 21, 2010

### Mapes

Can you show your steps? It's just a matter of differentiating F and playing with a few terms. Also, $S=-(\partial F/\partial T)_V$.