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← ScienceWhich 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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