## Homework Problem 9.13

$\Delta S = \frac{q_{rev}}{T}$

Ardo 2K
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

### Homework Problem 9.13

When given a problem like this one when a gas changes both volume and temperature how would we calculate the entropy change? Do we take each change individually, for example do we take the change from 3L to 0.500L first into account and calculate the entropy change and then the change of temperature from 18.5 to 28.1, and then add the two together? Please help, thank you.

Sabah Islam 1G
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

### Re: Homework Problem 9.13

For a problem like this one, you would take each change individually and add the two together in order to get the net change in entropy. You would be using the equations: delta S=nRln(V2/V1), which is for the change in volume, and delta S=nRln(T1/T2), for the change in temperature. Then, you would add the two entropies together in order to find the net change in entropy.