## Entropy and Pressure

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

Ami_Pant_4G
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am

### Entropy and Pressure

When pressure increases, does entropy decrease? If so can someone please explain why? Thanks in advance.

ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

### Re: Entropy and Pressure

I think that when pressure increases, volume decreases and when volume decreases entropy also decreases.

rabiasumar2E
Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

### Re: Entropy and Pressure

Yes! When pressure increases, entropy decreases because volume decreases.

Matt F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: Entropy and Pressure

Entropy increases as a system gets bigger, meaning that the opposite is also true (a smaller volume means entropy decreases). When we are talking about pressure and temperature we are usually talking about a closed system with a piston, so if a piston compresses and increases pressure, volume is decreased and entropy is therefore also decreased