Question

Calculate ΔH∘ in kilojoules for the reaction of ammonia (ΔH∘f=−46.1 kJ/mol) with O2 to yield nitric oxide NO (ΔH∘f=91.3 kJ/mol) and H2O(g) (ΔH∘f=−241.8 kJ/mol), a step in the Ostwald process for the commercial production of nitric acid.

Answer 1

@samjordon

Answer 2

@abb0t I got dejected from Ryerson ... ya think I can solve this stuff -.-

Answer 3

@jhunty

Answer 4

@jhunny * ?

Answer 5

#whatever

Answer 6

You first need to balance the reaction:

\[? NH_{3} (g) + ? O_{2} (g) \rightarrow ? NO (g) + ? H_{2}O (g)\]

Once you've balanced the equation its just a matter of taking the standard enthalpy of each molecule, multiplied by there stochimetric multiples, and doing the products - the reactants.