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← ScienceWhich mechanism causes increased reaction velocity when a Haber-Bosch catalyst particle gets smaller?
A)Increased active site surface area✓
B)Enhanced quantum tunneling effect
C)Decreased activation energy barrier
D)Higher catalyst particle kinetic energy
💡 Explanation
Smaller catalyst particles increase the surface area for reactant adsorption because decreasing particle size increases the proportion of surface atoms. This enhanced reactant contact therefore accelerates catalysis owing to heightened surface area, rather than changes in particle energy.
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