Third Law of Thermodynamics

Boltzmann Equation for Entropy:

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Fatima_Iqbal_2E
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Third Law of Thermodynamics

Postby Fatima_Iqbal_2E » Sat Jan 27, 2018 11:04 pm

Could someone please explain what exactly the Third Law of Thermodynamics is? I remember going over it in lecture, but I don’t quite understand it.

Matthew 1C
Posts: 47
Joined: Fri Sep 29, 2017 7:06 am

Re: Third Law of Thermodynamics

Postby Matthew 1C » Sat Jan 27, 2018 11:09 pm

in class it was said that the third law of thermodynamics says that the limit of S as the temperature approaches 0 Kelvin equals 0. What that says is that the entropy at 0 Kelvin is 0, so it is perfectly ordered material

Adrienne Dang 1B
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Re: Third Law of Thermodynamics

Postby Adrienne Dang 1B » Sun Jan 28, 2018 10:34 am

yes, so it is basically defining absolute zero on the entropy scale and this is important because the entropy determined relative to this point is the absolute entropy.

Tasnia Haider 1E
Posts: 55
Joined: Sat Jul 22, 2017 3:01 am

Re: Third Law of Thermodynamics

Postby Tasnia Haider 1E » Sun Jan 28, 2018 12:39 pm

The third law of thermodynamics states that for a perfect crystal at absolute zero, the entropy is also zero.

Niyanta Joshi 1F
Posts: 30
Joined: Thu Jul 13, 2017 3:00 am

Re: Third Law of Thermodynamics

Postby Niyanta Joshi 1F » Sun Jan 28, 2018 1:42 pm

Also, absolute zero is a theoretical concept. It may not be achieved experimentally. This is because from the second law of thermodynamics, we know that heat will spontaneously move from a warmer body to a cooler body, so the object that one tries to cool to absolute zero will try to take in heat from its surroundings.


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