Entropy and Degeneracy

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

Stella Lee 3C
Posts: 27
Joined: Fri Sep 25, 2015 3:00 am

Entropy and Degeneracy

Regarding the entropy formula, S=nRln2, do we utilize this formula when the two volumes aren't given? But if we are give nthe two volumes, do we utilize S=nRln(V2/V1)?

Chiara R 1K
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: Entropy and Degeneracy

I think the formula S=nRln2 applies for systems with a degeneracy of two (they can only be in 2 possible states). Otherwise, for given volume changes (and thus entropy changes) I think we use $\Delta$S=nRln(V2/V1) (although sometimes V2/V1 is equal to 2 so it ends up being $\Delta$S=nRln2!)

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