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← ScienceWhich consequence results when the Arrhenius frequency factor increases unexpectedly in industrial ammonia synthesis?
A)Reaction equilibrium shifts unfavorably
B)Required catalyst mass decreases sharply
C)Activation energy barrier effectively rises
D)Uncontrolled exothermic runaway reaction✓
💡 Explanation
Thermal runaway proceeds through positive feedback. An increased frequency factor raises reaction rate and heat release, which accelerates because catalyst surface area amplifies thermal effects via enhanced reaction kinetics; therefore a chain reaction, rather than changes to equilbrium, arises.
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