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â ScienceWhich outcome results when a catalyst increases a reaction's rate constant?
A)Lower activation energy barrierâ
B)Decreased equilibrium constant
C)Reduced reactant concentration needed
D)Higher reaction enthalpy change
đĄ Explanation
When a catalyst is introduced, the reaction rate constant increases because the activation energy barrier is lowered by providing an alternative reaction pathway. Therefore, a lower activation energy is the result, rather than a change in equilibrium constant, reactant concentration, or enthalpy, which depend on thermodynamics independently.
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