Question

If an endothermic reaction is in equilibrium what will happen when you increase the temperature

Answer 1

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Here K will increase with increase in temperature.

Answer 2

For an exothermic reaction, heat is essentially a product of the reaction. In keeping with Le Chatelier's principle, if you increase the temperature you are increasing the amount of products, and so you shift the balance at equilibrium back toward reactants, meaning there will be more reactants left at equilibrium.