Entropy of Fusion


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Tessa Lawler 1A
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Entropy of Fusion

Postby Tessa Lawler 1A » Tue Feb 26, 2019 5:39 pm

When finding the entropy of fusion of water, why do you take the entropy of fusion of the liquid state minus the entropy of fusion of the solid state, and not the other way around? Shouldn't it be final - initial state?

Simmi Diwanji 2B
Posts: 32
Joined: Fri Sep 28, 2018 12:20 am

Re: Entropy of Fusion

Postby Simmi Diwanji 2B » Wed Feb 27, 2019 1:09 am

The entropy of a liquid is always going to be more than a solid because there is more random movement of particles, so to find the entropy of fusion (going from solid to liquid), you would need to subtract the entropy of solid from the entropy of liquid.

Danny Elias Dis 1E
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Entropy of Fusion

Postby Danny Elias Dis 1E » Wed Feb 27, 2019 10:39 am

Just to be sure, S on its own must always be positive, but deltaS can be positive or negative, right?

Alexa Tabakian 1A
Posts: 38
Joined: Fri Sep 28, 2018 12:20 am

Re: Entropy of Fusion

Postby Alexa Tabakian 1A » Wed Feb 27, 2019 1:25 pm

Yes, delta S can be both positive and negative.


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