## Delta S Universe

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

Brittney Hun 2C
Posts: 104
Joined: Wed Sep 11, 2019 12:15 am

### Delta S Universe

When do we know that the delta S of the universe is equal to 0. In the solutions manual it says that a reversible process has delta S=0

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

### Re: Delta S Universe

reversible processes have delta S universe = 0. Since deltaS(sys) + deltaS(surr) = deltaS(universe) = 0, deltaS(sys) = -deltaS(surr).