Question

Determine the equilibrium constant (Kc) for the chemical reaction: 2 SO2(g) + O2(g) ⇌ 2 SO3(g)Given that at a certain temperature, the concentrations of SO2, O2, and SO3 are 0.25 M, 0.15 M, and 0.40 M, respectively, at equilibrium.

Answer 1

To determine the equilibrium constant  Kc  for the given reaction, we need to use the equilibrium concentrations of the reactants and products. The general expression for Kc for this reaction is:Kc = [SO3]^2 /  [SO2]^2 * [O2] Given the equilibrium concentrations of SO2, O2, and SO3 are 0.25 M, 0.15 M, and 0.40 M, respectively, we can plug these values into the Kc expression:Kc =  0.40 ^2 /   0.25 ^2 *  0.15  Kc = 0.16 /  0.0625 * 0.15 Kc = 0.16 / 0.009375Kc  17.07Therefore, the equilibrium constant  Kc  for this reaction at the given temperature is approximately 17.07.