Calculating Enthalpy Based on Data

Question

Given the following data:

2 O3 (g) →3 O2 (g) ∆H=−427 kJ

O2 (g) →2O (g) ∆H= 495 kJ

NO (g) + O3 (g) →NO2 (g) + O2 (g) ∆H= −199 kJ

calculate the enthalpy change for the reaction

NO (g) + O (g) →NO2 (g)

Answer 1