## Thermodynamics: Entropy

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

Elizabeth Flores
Posts: 11
Joined: Mon Jan 26, 2015 2:17 pm

### Thermodynamics: Entropy

Can someone explain how an increase in entropy will result in gas expansion?

Sandeep Gurram 2E
Posts: 42
Joined: Fri Sep 25, 2015 3:00 am

### Re: Thermodynamics: Entropy

I think it is more along the lines of an increase in the expansion of gas will cause an increase in entropy. Entropy is a measure of disorder. Now, there is thermal disorder, disorder from increasing the thermal motion of molecules (heating a substance).

There is also positional disorder, which is what you're referring to in gas expansion. When a gas expands, it increases this positional disorderliness by dispersing the molecules of a particular substance over a greater volume and therefore the entropy increases.

Hope that helped!

Elizabeth Flores
Posts: 11
Joined: Mon Jan 26, 2015 2:17 pm

### Re: Thermodynamics: Entropy

Yes it did, thank you!