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Which chemical outcome occurs when excess reactant added exceeds equilibrium constraints?

A)Reaction shifts toward product formation
B)Exothermic enthalpy reaction reverses direction
C)Rate constant remains unchanged thereafter
D)Activation barrier energy irreversibly increases

💡 Explanation

Adding excess reactant drives the reaction to favor product to re-establish equilibrium, because Le Chatelier's principle causes the reaction quotient to shift. Therefore, product formation increases rather than reversing exohermic reactions or changing activation energies.

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