Question

For an equilibrium reaction A (g) + B (g) $\rightleftharpoons$ C (g) + D (g), $\Delta H$ = -ve. An increase in temperature would cause

• A. An increase in the value of $K_{eq}$
• B. A decrease in the value of $K_{eq}$
• C. No change in the value of $K_{eq}$
• D. A change in $K_{cq}$ which cannot be qualitatively predicted

Answer 1

The correct option is B

A decrease in the value of $K_{eq}$

The reaction will shift to the reactant side with increase in temperature. Since the concentrations of reactants appear in the denominator and those of products appear in the numerator, the value of equilibrium constant will decrease.