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July 1, 2015

Homework Help: Chemistry (Hess's Law)

Posted by Monty on Friday, April 15, 2011 at 1:52am.

NO2(g) → 1⁄2N2(g) + O2(g) ΔH1 = -33.9 kJ

NO2(g) → NO(g) + 1⁄2O2(g) ΔH2 = 56.5 kJ

What is ΔH for the reaction 1⁄2N2(g) + 1⁄2O2(g) → NO(g) ?

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