The equilibrium-constant expression depends on the stoichiometry of the reaction.
Explanation:
Equilibrium constant is important because it tells us where the equilibrium is.
The larger the equilibrium constant, the further the equilibrium is towards its products.
The equilibrium constant is affected by factors like change in temperature of the system, change in the pressure and also if some inert gases are added etc.
If we take the factor temperature change into account, the equilibrium constant decreases if the temperature increases. It happens, when the forward reaction is exothermic.
If the reaction is endothermic, then with increase in the temperature, the equilibrium constant will also increase.
