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### Residual Entropy

Posted: **Fri Feb 08, 2019 12:47 am**

by **305174946**

In lecture Lavelle did an example using four carbon monoxide molecules and mentioned that there is no translational/rotational movement and I was wondering what else must be stagnant for this system to have residual entropy?

### Re: Residual Entropy

Posted: **Fri Feb 08, 2019 5:55 pm**

by **Maria Solis Disc 1G**

I honestly do not know what residual entropy is, but Dr. Lavelle mentioned rotational state, translational state, vibrational state, and an electron's state in the actual atom.

### Re: Residual Entropy

Posted: **Sat Feb 09, 2019 11:11 am**

by **Alexa_Henrie_1I**

Residual entropy is positional entropy. We can find it using SkblnW (this ignores thermal energy).

### Re: Residual Entropy

Posted: **Sun Feb 10, 2019 4:43 pm**

by **Rami_Z_AbuQubo_2K**

Do more orientations mean a greater residual entropy?

### Re: Residual Entropy

Posted: **Tue Feb 12, 2019 6:02 pm**

by **Maddy Mackenzie**

Yes, more possible positions leads to greater residual entropy. Since the equation is delta S= Kb ln W and W is the number of states raised to the number of molecules in the system, the increase in the number of states increases W and therefore increases entropy.

### Re: Residual Entropy

Posted: **Tue Feb 12, 2019 6:03 pm**

by **Maddy Mackenzie**

I was wondering if the only time you use the equation delta S=Kb ln W is if you are calculating positional entropy?