enthalpy of phase change

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Chew 2H
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Joined: Fri Sep 29, 2017 7:05 am

enthalpy of phase change

Postby Chew 2H » Mon Jan 22, 2018 4:25 pm

In the question Dr Lavelle showed us in lecture, Br2(l) --> 2Br(g), i understand that we have to add the enthalpy of vaporization with the bond enthalpies. But what would the enthalpy of vaporization be? is it the normal n*heat of vaporization or is there another way of it?

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Re: enthalpy of phase change

Postby Chem_Mod » Mon Jan 22, 2018 4:43 pm

To calculate the enthalpy of vaporization, you can calculate the enthalpy change for vaporization reaction by the following: the heat of formation for gaseous bromine minus the heat of formation for liquid bromine.

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