Answer to Question #176427 in General Chemistry for anonymous

Question

In the manufacture of nitric acid by the oxidation of ammonia, the first product is nitric oxide (NO), which is then oxidised to nitrogen dioxide (NO₂). Using the standard reaction enthalpies

           N₂ (g) + O₂ (g) ---> 2NO (g)  ΔH^o = +180.6 kJ

           N₂ (g) + 2O₂ (g) ---> 2NO₂ (g)           ΔH^o = +66.4 kJ

Calculate the ΔH^o for the following reaction

2NO (g) + O₂ (g) ---> 2NO₂ (g)

Answer 1

2× 66.4=132.8kJ