For an exothermic reaction at equilibrium, if temperature is increased then there will be a shift toward the reactants and Keq will decrease.
The Equilibrium Constant (Keq) is the value associated with the amount of reactant and product in a chemical reaction.
This value (Equilibrium Constant) is only modified in a chemical reaction due to the temperature.
In conclusion, for an exothermic reaction at equilibrium, if temperature is increased then there will be a shift toward the reactants and Keq will decrease.
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