### Third law of thermodynamics

Posted: **Tue Feb 11, 2020 10:01 pm**

by **SMIYAZAKI_1B**

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?

### Re: Third law of thermodynamics

Posted: **Tue Feb 11, 2020 10:53 pm**

by **Victoria Zheng--2F**

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.