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Which consequence results when a catalyst is introduced into a chemical system with fixed rate constants?

A)Equilibrium is attained more rapidly
B)Endothermic reaction becomes exothermic
C)Equilibrium constant value changes
D)Activation energy threshold increases only

💡 Explanation

Introducing a catalyst speeds up the reaction via the mechanism of lowering activation energy, because the catalyst provides an alternative reaction pathway. Equilibrium is reached faster and both forward and reverse reactions are accelerated equally, therefore equilibrium is attained rapidly, rather than equilibrium constant values or endothermic changes.

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