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← ScienceWhich outcome occurs when lowering the activation energy barrier during catalytic hydrogenation?
A)Increased reaction yield; equilibrium unchanged✓
B)Increased equilibrium; unchanged yield
C)Decreased overall reaction rate constant
D)Endothermic reaction rate significantly enhanced
💡 Explanation
A catalyst lowers activation energy via a transition state effect, increasing the reaction rate but not the equilibrium, because it affects forward and reverse rates equally; therefore, the reaction reaches equilibrium faster and yields increase, rather than changing the equilibrium itself, under different reaction conditions.
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