The sign of entropy


Moderators: Chem_Mod, Chem_Admin

Jose Robles 1D
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

The sign of entropy

Postby Jose Robles 1D » Sun Feb 09, 2020 10:10 pm

In a problem, what determines the sign of entropy? The direction of rxn?

Wilson 2E
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

Re: The sign of entropy

Postby Wilson 2E » Sun Feb 09, 2020 10:19 pm

Based on the equations nRln(V2/V1) and nCln(T2/T1), the only way to get a negative delta entropy would be to have the ln term be negative. This would occur by having a decrease in volume or temperature, which produces a value less that 1 for V2/V1 and T2/T1, giving a negative number when using ln.

Posts: 108
Joined: Sat Sep 28, 2019 12:15 am

Re: The sign of entropy

Postby saigorijavolu2k » Sun Feb 09, 2020 10:21 pm

that is a very good question. I think that the sign of entropy is determined by how much disorder there is. If the substance is moving from solid to liquid, entropy is positive and vice versa.

Return to “Entropy Changes Due to Changes in Volume and Temperature”

Who is online

Users browsing this forum: No registered users and 1 guest