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← ScienceWhich consequence results when a catalyst degrades below a threshold value in a chemical reactor maintaining constant partial pressure?
A)Equilibrium constant shifts unexpectedly.
B)Reaction order inexplicably changes
C)Apparent activation energy increases.✓
D)Rate constant becomes temperature-dependent.
💡 Explanation
The apparent activation energy increases because the degradation reduces active sites, limiting reaction rate enhancement. Specifically, the Arrhenius equation dictates this change. Therefore, the activation energy rises, rather than the equilibrium shifting or order changing, due to hindered elementary steps.
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