A reaction vessel contains nh3, n2, and h2 at equilibrium at a certain temperature. the equilibrium concentrations are [n2] = 0.31 m, [h2] = 1.51 m, and [nh3] = 0.75 m. calculate the equilibrium constant, kc, if the reaction is represented as

The balanced equation for the reaction is,

N₂ (g) + 3H₂ (g) ⇄ 2NH₃ (g)

Since the given concentrations are taken at the equilibrium state, we can use those directly for the calculation.

Kc = [NH₃ (g) ]² / ([N₂ (g) ] x [H₂ (g) ]³)

Kc = (0.75 M) ² / ((0.31 M) x (1.51 M) ³)

Kc = 0.527 M⁻²