Residual Entropy

Boltzmann Equation for Entropy:

Moderators: Chem_Mod, Chem_Admin

Andy Liao 1B
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Residual Entropy

Postby Andy Liao 1B » Tue Feb 06, 2018 11:07 pm

I know that by definition, residual entropy is entropy at T=0K. However, I don't understand how this statement conceptually makes sense. Can someone please explain?

Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Residual Entropy

Postby soniatripathy » Wed Feb 07, 2018 5:52 am

0K is absolute zero at which there would be very little particle motion that contributes to heat. This also means that motion that contributes to thermal and positional disorder would be very low. the residual entropy is the amount of positional disorder that survives at such a low temperature. it is also the difference between the entropy we get from the statistical model and the experimental value (that could be found using something like calorimetry

Chris Lamb 1G
Posts: 58
Joined: Fri Jun 23, 2017 11:39 am

Re: Residual Entropy

Postby Chris Lamb 1G » Wed Feb 07, 2018 11:02 am

At 0K, there is no movement. The only disorder is resulting from position of the molecules. That is why residual entropy is positional entropy.

Return to “Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy”

Who is online

Users browsing this forum: No registered users and 1 guest