pressure effect on entropy

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

Elizabeth Gallmeister 1A
Posts: 41
Joined: Fri Sep 28, 2018 12:21 am

pressure effect on entropy

Why does entropy decrease when pressure increases?

daniella_knight1I
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: pressure effect on entropy

Since pressure is increasing, that means volume is decreasing, therefore there is less space for molecules to spread out, therefore less entropy.

Nina Do 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

Re: pressure effect on entropy

Right, when pressure increases, the inverse happens to volume. Entropy is the amount of possible positions that thing can have so when there is less space, the options for the different amount of positions it can hold are less so therefore, entropy is decreasing.