## monoatomic, diatomic, linear, non-linear

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

Jorja De Jesus 2C
Posts: 121
Joined: Sat Jul 20, 2019 12:15 am

### monoatomic, diatomic, linear, non-linear

Are these referring to the shape of a molecule? If so why does the shape affect entropy?

Deepika Reddy 1A
Posts: 125
Joined: Thu Jul 11, 2019 12:15 am

### Re: monoatomic, diatomic, linear, non-linear

I believe the shape affects how many different shapes or positions the atoms in the molecule can be in. Since entropy is associated with the number of states or positions the atoms in a molecule can take, the shape of the molecule is associated with entropy.

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

### Re: monoatomic, diatomic, linear, non-linear

The shape affects entropy because it affects the molar heat capacity, which is part of the equation for a change in temperature (delta S = C*ln(T2/T1)). Depending on the shape the molar heat capacity can be 3/2*R, 5/2*R, or 7/2*R

ASetlur_1G
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

### Re: monoatomic, diatomic, linear, non-linear

Do we have to have all the molar heat capacities for the different shapes memorized? I don't think all of them are on the constants and equations sheet...