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Calculate the enthalpy of the reaction 2NO(g) + O2(g) → 2NO2(g) given the following reactions and enthalpies of formation: 1. 1/2N2(g) + O2(g) → NO2(g), ΔH°A = 33.2 kJ 2. 1/2N2(g) + 1/2O2(g) → NO(G), ΔH°B = 90.2 kJ Express your answer numerically in kilojoules.