Question

Which of the following will not affect the value of equilibrium constant of a reaction?

• A. Change in the concentration of the reactants
• B. Change in temperature
• C. Change in pressure
• D. Addition of catalyst

Answer 1

Answer: (A), (C), (D)

Change in the concentration of the reactants
Change in pressure
Addition of catalyst

The following will not affect the value of equilibrium constant of a reaction.
(A) Change in the concentration of the reactants
(C) Change in pressure
(D) Addition of catalyst. The addition of catalyst affects the rate of forward reaction and the rate of reverse reaction but the value of the equilibrium constant is unaffected.
However, the value of the equilibrium constant is affected by (B) the change in temperature. When the reaction is endothermic reversible, the increase in temperature increases the value of the equilibrium constant and when the reaction is exothermic reversible, increase in the temperature decreases the value of the equilibrium constant.