# What is K in Equilibrium

An equilibrium constant, known as K eq, will describe any chemical equilibrium. The expressions K eq and K P are constructed as quantities of products separated by quantities of reactants; each quantity, in the balanced chemical equation, is elevated to the power of its coefficient by either concentration or strain.

The increase in temperature in exothermic reactions reduces the equilibrium constant, K, while the increase in temperature in endothermic reactions increases K. By assigning a constant value to K, the Le Chatelier concept applied to changes in concentration or pressure can be understood.