How does the temperature affect the Keq of a reactant?

The temperature affects the equilibrium constant (Keq) of a reaction by influencing the rates of the forward and reverse reactions. According to Le Chatelier's principle, an increase in temperature shifts the equilibrium position toward the endothermic direction, altering the value of Keq. For exothermic reactions, an increase in temperature typically decreases Keq, while for endothermic reactions, it increases Keq. Thus, temperature changes can significantly impact the thermodynamic favorability of a reaction at equilibrium.