Chapter 9, Problem 68E

Given the following data:

${\text{2O}}_{\text{3}}\text{(g)}\to {\text{3O}}_{\text{2}}\text{(g)}\text{ΔH}\text{=}-\text{427}\text{kJ}$

${\text{O}}_2\text{(g)}\to 2\text{O(g)}\text{ΔH}\text{=}\text{495}\text{kJ}$

$\text{NO(g)}\text{+}{\text{O}}_{\text{3}}\text{(g)}\to {\text{NO}}_{\text{2}}\text{(g)}\text{+}\text{}\text{}{\text{O}}_{\text{2}}\text{(g)}\text{ΔH}\text{=}-\text{199}\text{kJ}$

calculate $\text{ΔH}$ for the reaction

$\text{NO(g)}\text{+}\text{O(g)}\to {\text{NO}}_{\text{2}}\text{(g)}$