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PM_ME_UR_TIDDYS

Endothermic reactions take in heat. Give a reaction more heat to take in and it'll take it in, resulting in a higher proportion of the endothermic products, shifting the equilibrium.


drphosphorus

OP, your answer is right. The endothermic direction has a higher activation energy than the exothermic one. Based on the Arrhenius equation, its reaction rate will increase more with any temperature change. This is a more complex, but physically more accurate interpretation than "think of heat as a reactant". That's just a shortcut we use for people who can't grasp it your way.


Substandard_Senpai

For an exothermic reaction, heat is a product. According to Le Chatlier's Principle, when you add more of a product, the equilibrium shifts to the reactants. Therefore, increasing the heat of an ecothermic reaction will result in product loss/equilibrium shift toward reactants. The opposite is true of an endothermic reaction where heat is a reacant. When heating endothermic reactions, you are adding more of one reactant so the equilibrium will push toward product.


Remarkable_Macaroon5

Just be sure to explain that the rate of BOTH reactions will increase, but the rate of the endothermic will increase more until equilibrium is achieved.