9.27 Part D

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

Humza_Khan_2J
Posts: 56
Joined: Thu Jul 13, 2017 3:00 am

9.27 Part D

Can someone explain why the lower pressure gas has the higher entropy? Is it simply due to a volume difference(which I thought would be offset by the change in T)?

Johann Park 2B
Posts: 51
Joined: Thu Jul 27, 2017 3:01 am
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Re: 9.27 Part D

Volume is inversely proportional to the pressure, and with a decrease in volume (increase of pressure), the random movement of gaseous molecules decreases. Thus, the molar entropy decreases. I'm pretty sure that in this case we are regarding T as a constant.

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