Given the following data,


N2 (g) + O2 (g) → 2NO (g) ∆H = + 180.7 kJ

2NO (g) + O2 (g) → 2NO2 (g) ∆H = -113.1 kJ

2N2O (g) → 2N2 (g) + O2 (g) ∆H = -163.2 kJ


Use Hess’s law to calculate the ∆H for the reaction

N2O (g) +NO2 (g) → 3 NO(g)