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September 4, 2015

Homework Help: Chemistry

Posted by Chris on Monday, May 5, 2014 at 4:06pm.

Calculate the enthalpy change for the reactions
NO(g) + O(g) → NO2(g)
from the following data:
NO(g) + O3(g) → NO2(g) + O2(g) ΔH = -198.9 kJ
O3(g) → 1.5O2(g) ΔH = -142.3 kJ
O2(g) → 2O(g) ΔH = 495.0 kJ

Put the answer in kJ.

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