Question

The equilibrium constant \(K\) of a chemical reaction depends on

• A. Temperature only
• B. Pressure only
• C. Pressure and temperature
• D. Catalyst concentration

Hint:

For a fixed reaction, equilibrium constant changes only with temperature. Catalyst does not change equilibrium constant.

Answer 1

The Correct Option is A

The equilibrium constant of a chemical reaction is represented by: \[ K \] For a given chemical reaction, \(K\) depends only on temperature. It does not depend on the initial concentration of reactants or products. It also does not depend on catalyst concentration. A catalyst only helps the system reach equilibrium faster. It does not change the equilibrium constant. Pressure may affect the equilibrium composition of gaseous reactions, but the equilibrium constant at a fixed temperature remains constant. The temperature dependence of equilibrium constant is given by Van't Hoff equation. Therefore: \[ K=K(T) \] Hence, the equilibrium constant depends on: \[ \text{temperature only} \]