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Standard Enthalpy of Formation

Posted: Fri Jan 08, 2016 1:29 pm
by JukaKim_1D
Why is the standard enthalpy of formation for liquid water not 0? Isn't water at its most stable form as a liquid?

Re: Standard Enthalpy of Formation

Posted: Fri Jan 08, 2016 1:43 pm
by Austin Hyun 1F
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!

Re: Standard Enthalpy of Formation

Posted: Fri Jan 08, 2016 2:30 pm
by Chem_Mod
The above discussion is correct. Well done!