## Delta S(total)

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

Marni Kahn 1A
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### Delta S(total)

In what cases does delta S(total)=0?

Nick Fiorentino 1E
Posts: 102
Joined: Wed Sep 18, 2019 12:16 am

### Re: Delta S(total)

Since entropy is a state function, Delta S could be equal to zero if you return to your "starting point". So, if you increase the volume of a container containing gas and then compress it to its original volume, delta S would be zero

Brooke Yasuda 2J
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Joined: Sat Jul 20, 2019 12:17 am

### Re: Delta S(total)

The total entropy change also equals zero in an isothermal reaction. In this case, the q of the surroundings is equal and opposite in sign to the q of the system. So, the entropy change total is zero

Pablo 1K
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Joined: Sat Feb 02, 2019 12:15 am

### Re: Delta S(total)

if you did some expansion work (I believe if it can be reversed) and then compressed back to your original state then delta s would give you =0.