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August 28, 2015

Homework Help: College Chemistry- Hess's Law

Posted by Tahnee on Friday, October 22, 2010 at 8:43pm.

Nitrogen oxides undergo many interesting reactions in the environment and in industry. Given the following information, calculate H for the overall equation: 2 NO2(g) + 1/2 O2(g) = N2O5(s).
2 NO(g) + 3/2 O2(g) = N2O5(s), H = -223.7 kJ
NO(g) + 1/2 O2(g) = NO2(g), H = -57.1 kJ

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