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← ScienceWhich outcome occurs when a catalyst degrades slowly with time in an industrial esterification reactor?
A)Equilibrium constants remain unchanged
B)Initial reaction rate increases
C)Activation energy decreases
D)Effective rate constant decreases✓
💡 Explanation
Catalyst degradation lowers activity over time causing a need for increasingly higher temperatures; this decreases the observed rate constant because the active sites are diminished. Therefore, product output will decrease, rather than the reaction shifting, because degradation changes active enzyme concentration, hence, the initial and general rate.
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