In the manufacture of nitric acid by the oxidation of ammonia, the first product is nitric oxide. The nitric oxide is then oxidized to
nitrogen dioxide:
2NO(g) + O2(g) -! 2NO2(g)
Calculate the standard reaction enthalpy for the reaction above (as written) using the following data:
N2(g) + O2(g) -! 2NO(g)
H? = 180.5 kJ
N2(g) + 2O2(g) -! 2NO2(g)
H? = 66.4 kJ