Phase change equation

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Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

Phase change equation

Postby Mya Majewski 1L » Sun Feb 10, 2019 7:01 pm

For 6th edition 8.85 or a phase change in general, do you use q=nDeltaH or deltaH=nDeltaH because for this phase change it uses deltaH=n x deltaHfus?

Megan_Ervin_1F
Posts: 78
Joined: Fri Sep 28, 2018 12:18 am

Re: Phase change equation

Postby Megan_Ervin_1F » Sun Feb 10, 2019 7:51 pm

When the temperature is rising you need to use q=mcT (This is on the slanted lines of the heating curve)
When the temperature is constant and the substance is undergoing a phase change you use: mass X enthalpy


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