Question

nitrogen and hydrogen react to form ammonia, like this:

n₂(g)+3h₂(g)→2nh₃(g)

write the pressure equilibrium constant expression for this reaction.

Explanation:

Step1: Write the general formula for pressure equilibrium constant

For a reaction \(aA(g)+bB(g)
ightleftharpoons cC(g)+dD(g)\), the pressure equilibrium constant \(K_p=\frac{P_C^c\times P_D^d}{P_A^a\times P_B^b}\), where \(P\) represents partial pressure.

Step2: Substitute the values from the given reaction

In the reaction \(N_2(g)+3H_2(g)
ightleftharpoons 2NH_3(g)\), \(a = 1\) (for \(N_2\)), \(b=3\) (for \(H_2\)), \(c = 2\) (for \(NH_3\)).
So, \(K_p=\frac{P_{NH_3}^2}{P_{N_2}\times P_{H_2}^3}\)

Answer:

\(K_p=\frac{P_{NH_3}^2}{P_{N_2}\times P_{H_2}^3}\)