Ammonia, NH3(AH = 46.2 kJ), reacts with oxygen to produce water (AH = -241.8 kJ) and nitric oxide, NO (AH = 91.3 kJ), in the following reaction:
4NH3 (9) +502(g) → 6H2O(g) + 4NO(g)
What is the enthalpy change for this reaction?
Use AH men=(AHE products) - (AHe reactants).