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Which effect stabilizes reaction rates inside a catalytic converter encountering sudden exhaust temperature spikes?

A)Increased surface area diffusion limitation
B)Decreased reactant adsorption efficacy
C)Enhanced product desorption kinetics
D)Shift in catalyst active site coverage

💡 Explanation

During temperature spikes, increased diffusion rates cause reactants to saturate the catalyst surface, limiting further rate increases despite higher kinetic energies, protecting against runaway reactions. Therefore, surface area diffusion limitation stabilizes the rate, rather than less adsorption, more desorption or active site changes each having different kinetics.

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