## 3rd Law of Thermodynamics

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

Selena Yu 1H
Posts: 108
Joined: Fri Aug 09, 2019 12:16 am

### 3rd Law of Thermodynamics

What is the 3rd Law of Thermodynamics and why is it important? How does it relate to entropy or enthalpy?

Connie Chen 1E
Posts: 51
Joined: Mon Jun 17, 2019 7:24 am

### Re: 3rd Law of Thermodynamics

The third law of thermodynamics states that as a system's temperature approaches absolute zero (0 K), the entropy of the system becomes 0. This is important because it implies that there is an absolute scale for entropy. It also allows us to assume that S=kBln(w)=0 if a system can be prepared in only one way (it is a perfect crystal).

Fatemah Yacoub 1F
Posts: 114
Joined: Thu Jul 11, 2019 12:16 am

### Re: 3rd Law of Thermodynamics

It is also states that the sign of entropy is always positive as long as the system is above absolute zero. This means that entropy in increase and the system is spontaneous as long as the the system is above absolute zero.

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