2 CH4 (g) ----- > C2H2 (g) + 3 H2 (g)

Question

A mixture of CH4, C2H2 and H2 reached equilibrium at 1,700°C. The concentrations were measured as: [CH4] = 0.0203 M, [C2H2] = 0.0451 M, and [H2] = 0.112 M. Calculate the equilibrium constant of this reaction.

Answer 1

2 CH4 (g) ----- > C2H2 (g) + 3 H2 (g)

Keq = [C2H2][H2]³ / [CH4]²

Keq = (0.0451)(0.112)² / 0.0203)²

Keq = 1.37