Calculating Change in Entropy for Phase Changes


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Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Calculating Change in Entropy for Phase Changes

Postby Sydney Myers 4I » Tue Feb 11, 2020 11:18 am

Why are there three steps to finding the change in entropy at a transition temperature? If entropy is a state function, then how does heating a substance then cooling a substance give us anything other than delta S = 0?

Benjamin Feng 1B
Posts: 102
Joined: Sat Sep 07, 2019 12:19 am

Re: Calculating Change in Entropy for Phase Changes

Postby Benjamin Feng 1B » Tue Feb 11, 2020 1:16 pm

This is because you have to change the phase of the substance. The 2 different phases will also have different molar entropies.


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