Standard Enthalpy of Formation

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JukaKim_1D
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Standard Enthalpy of Formation

Postby JukaKim_1D » Fri Jan 08, 2016 1:29 pm

Why is the standard enthalpy of formation for liquid water not 0? Isn't water at its most stable form as a liquid?

Austin Hyun 1F
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: Standard Enthalpy of Formation

Postby Austin Hyun 1F » Fri Jan 08, 2016 1:43 pm

Standard enthalpy of formation will be zero for elements, not compounds. For instance, H2O is composed of H2 and 1/2O2, and both of these have a standard enthalpy of formation of 0. I hope that helps!

Chem_Mod
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Re: Standard Enthalpy of Formation

Postby Chem_Mod » Fri Jan 08, 2016 2:30 pm

The above discussion is correct. Well done!


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