Residual Entropy

[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?

[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.

[Alexa_Henrie_1I]

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

[Rami_Z_AbuQubo_2K]

Do more orientations mean a greater residual entropy?

[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.

[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?