Phase changes equations

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Raquel Ruiz 1K
Posts: 30
Joined: Tue Nov 14, 2017 3:02 am

Phase changes equations

Postby Raquel Ruiz 1K » Sun Feb 10, 2019 12:45 pm

Hello, what are some of the phase changes equations we should know?

Rachana Jayaraman 1H
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: Phase changes equations

Postby Rachana Jayaraman 1H » Sun Feb 10, 2019 1:19 pm

For temperature changes in a particular state (solid, liquid,gas), you use q = mcdeltaT.
For phase changes specifically, you do deltaH*n where n is the number of moles.
The delta H corresponds to the change that is taking place such as fusion, vaporization. You should remember for opposite processes such as freezing and condensation, you need to take the negative of the delta H for the forward processes.


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