For the reaction CO(g) + 2 H2(g) ⇌ CH3OH(g) at 700. K, equilibrium concentrations are [H2] = 0.072 M, [CO] = 0.020 M, and [CH3OH] = 0.030 M. Calculate K.

Answer 1

CO(g) + 2H₂(g) <==> CH₃OH(g)

0.02.....0.072..............0.030.......equilibrium concentrations

The equilibrium expression is the ratio of the products to the reactants, each raised to a power of the coefficient in the balanced equation. So, for this reaction, the equilibrium expression is...

Keq = [CH₃OH] / [CO] [H₂]²

Keq = (0.030) / (0.02)(0.072)²

Keq = 289