The effect of increasing temperature on a reaction depends on whether the reaction is exothermic or endothermic. An exothermic reaction occurs when the temperature of a system increases due to the evolution of heat, while an endothermic reaction absorbs heat from the surroundings/Equilibria/Le_Chateliers_Principle/Effect_Of_Temperature_On_Equilibrium_Composition/Exothermic_Versus_Endothermic_And_K).
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Exothermic reaction: If a reaction is exothermic, increasing the temperature will shift the equilibrium towards the reactants, as the reaction will favor the direction where heat is absorbed/Equilibria/Le_Chateliers_Principle/Effect_Of_Temperature_On_Equilibrium_Composition). Conversely, decreasing the temperature will shift the equilibrium towards the products, as the reaction will favor the direction where heat is released.
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Endothermic reaction: If a reaction is endothermic, increasing the temperature will shift the equilibrium towards the products, as the reaction will favor the direction where heat is released/Equilibria/Le_Chateliers_Principle/Effect_Of_Temperature_On_Equilibrium_Composition). Conversely, decreasing the temperature will shift the equilibrium towards the reactants, as the reaction will favor the direction where heat is absorbed.
In summary, increasing the temperature of an exothermic reaction will shift the equilibrium towards the reactants, while increasing the temperature of an endothermic reaction will shift the equilibrium towards the products.
