## Self Test 9.2

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

Nha Dang 2I
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

### Self Test 9.2

Self-Test 9.3A Calculate the change in molar entropy of an ideal gas when it is compressed isothermally to one-third its initial volume.

So far, I can see that you use the equation deltaS=nRln(V2/V1), but what would you use for n in this case?

RyanS2J
Posts: 32
Joined: Thu Jul 27, 2017 3:00 am

### Re: Self Test 9.2

Since they're asking for molar entropy (by definition the entropy at one mole of substance), n would simply be 1.