In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydro...

In the late eighteenth century Priestley prepared ammonia by reacting HNO₃(g) with hydrogen gas. The thermodynamic equation for the reaction is

(a) Calculate ΔH when one mole of hydrogen gas reacts.

(b) What is ΔH when 10.00 g of NH₃(g) are made to react with an excess of steam to form HNO₃ and H₂ gases?