## 9.47

Boltzmann Equation for Entropy: $S = k_{B} \ln W$

vicenteruelos3
Posts: 42
Joined: Fri Sep 29, 2017 7:07 am

### 9.47

why is change in entropy surroundings equal to 0 for irreversible free expansion but not for reversible?

SantanaRodriguezDis1G
Posts: 56
Joined: Sat Jul 22, 2017 3:00 am

### Re: 9.47

the total entropy change is equal to zero not just entropy of the system or surroundings

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