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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
Calculate the enthalpy of the reaction.
Express your answer with the appropriate units.
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