units of hess's law, bond enthalpy, standard enthalpy

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904475052_
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units of hess's law, bond enthalpy, standard enthalpy

Postby 904475052_ » Thu Jan 14, 2016 9:26 am

Can someone clarify what the units of the final answer will be for Hess's Law, Bond Enthalpies, and Standard Enthalpies of Formation problems, please?

Heerali Patel 3A
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: units of hess's law, bond enthalpy, standard enthalpy

Postby Heerali Patel 3A » Thu Jan 14, 2016 11:55 am

For Standard Enthalpy of Formation and Bond Enthalpy values, units will be in kJ/mol, however, these values are used to find the Standard Enthalpy of Reaction which will be in units of kJ. With Hess's Law, on the other hand, the reaction enthalpies used in each step and the overall reaction enthalpies will be in kJ.

To summarize, the final answers for Hess's Law, Bond Enthalpy, and Standard Enthalpy of Formation problems will be in kJ.


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