## Third law of thermodynamics

Boltzmann Equation for Entropy: $S = k_{B} \ln W$

SMIYAZAKI_1B
Posts: 63
Joined: Sat Aug 24, 2019 12:15 am

### Third law of thermodynamics

When it comes to third law of thermodynamics, by taking a limit, does that mean that as the temperature of the system becomes 0K, entropy becomes 0? So for this equation, because it is absolute zero, there would be no more movement of the molecules which means there would be no possible positions?

Victoria Zheng--2F
Posts: 103
Joined: Fri Aug 09, 2019 12:17 am

### Re: Third law of thermodynamics

For the Third Law of Thermodynamics, at the absolute temperature of 0K for a perfect structure, there will only be one possible position, which means that the degeneracy is 1, and since the entropy is taking the natural log of degeneracy, natural log of 1 is zero, so the entropy of a perfect structure at absolute temperature of 0K is 0.

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