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The Third Law

Posted: Fri Feb 02, 2018 3:15 pm
by Hector Acosta Discussion 1H
Can someone explain to me the third law of thermodynamics?

Re: The Third Law

Posted: Fri Feb 02, 2018 3:55 pm
by Cam Bear 2F
The third law of thermodynamics states that entropy of a perfect crystal is zero when the temperature is zero Kelvin. If it isn't a perfect crystal or if it is at a different temperature there will be residual entropy.

Re: The Third Law

Posted: Fri Feb 02, 2018 3:58 pm
by Cam Bear 2F
A perfect crystal only has one microstate so w=1. When you plug 1 into the equation S=kb*ln(w) and solve, you get zero.

Re: The Third Law

Posted: Sun Feb 04, 2018 11:44 pm
by Miguel Velasco 2J
we know the micro state is w=1 because there exists no movement at 0 Kelvin therefore resulting in entropy equal to 0.