Given the data
N2 (g) + O2 (g) → 2 NO (g) ΔH = +180.7 kJ
2 NO (g) + O2 (g) → 2 NO2 (g) ΔH = -113.1 kJ
2 N2O (g) → 2 N2 (g) + O2 (g) ΔH = -163.2 kJ
use Hess’s law to calculate ΔH for the reaction
N2O (g) + NO2 (g) → 3 NO (g)
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