## Concept of 3rd Law of Thermodynamics

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

Milena Aragon 2B
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Joined: Fri Sep 28, 2018 12:19 am

### Concept of 3rd Law of Thermodynamics

Can someone please explain the concept behind the third law and what kind of problems we may encounter where we would need to use it? Thank you.

Chem_Mod
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### Re: Concept of 3rd Law of Thermodynamics

The concept is that entropy’s theoretical limit is 0 if there is absolute order in a system. We can calculate positional and residual entropy with formulas you learned in class.

Ruiting Jia 4D
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

### Re: Concept of 3rd Law of Thermodynamics

Chem_Mod wrote:The concept is that entropy’s theoretical limit is 0 if there is absolute order in a system. We can calculate positional and residual entropy with formulas you learned in class.

What do you mean by absolute order?

Chem_Mod
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### Re: Concept of 3rd Law of Thermodynamics

Meaning a perfect crystal with no impurities.

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