Entropy of Transition

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Ju-Wei Wang 1I
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

Entropy of Transition

Postby Ju-Wei Wang 1I » Sat Feb 03, 2018 11:30 pm

How do you find the entropy of transition at a temperature other than the transition temperature?

Andy Liao 1B
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Re: Entropy of Transition

Postby Andy Liao 1B » Sat Feb 03, 2018 11:53 pm

There are four steps that need to be done to find the entropy of transition at a temperature other than the transition temperature. If vaporization is involved, you first have to heat the liquid to its normal boiling point (ΔS = Cln(T2/T1)). Then, you have to allow it to vaporize (ΔSovap = ∆Hvap/Tb). Next, you have to cool the vapor back to the desired temperature (ΔS = Cln(T2/T1)). Lastly, you sum the three entropies. A similar process is done for melting.


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