Ocr a level chem

This question is about reactions of ammonia with oxygen.
Ammonia can react in different ways with oxygen.
Reaction 1: In the presence of a platinum catalyst, ammonia is oxidised to nitric oxide and oxygen is reduced.
Reaction 2: Ammonia is heated with oxygen in the absence of a catalyst producing nitrogen and one other gaseous product.
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Write balanced chemical equations, with whole number coefficients, for these reactions.

B) Give an expression for the equilibrium constant, Kp, when Reaction 1, from part (a), occurs at 320 K.