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April 28, 2015

Homework Help: Chemistry

Posted by Liz on Sunday, July 20, 2014 at 5:13pm.

I am to use this formula to find ΔHf,methane:
ΔHcomb=2ΔHf,water+ΔHf, carbon dioxide-ΔHf,methane-2ΔHf,oxygen

For ΔHcomb, the value is 884 KJ/mol
For ΔHf,water, the value is -285.8
For ΔHf,carbon dioxide, the value is -393.5

I was not given ΔHf,oxygen, what value would it be?

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