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← ScienceWhich consequence results when Arrhenius constant falls unexpectedly low in industrial ammonia synthesis?
A)Equilibrium favors reactant formation
B)Catalyst selectivity unexpectedly rises
C)Reaction rate becomes mass-transport limited✓
D)Recycle loop pressure exceeds design limits
💡 Explanation
If the Arrhenius constant drops, the intrinsic reaction rate decreases because of the relationship described by the Arrhenius equation; therefore overall reaction efficiency drops and mass transport becomes limiting, rather than the reaction activation energy under normal catalysis operation.
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