Which phenomenon decreases the overall reaction rate in unimolecular gas-phase decomposition at elevated pressures?

💡 Explanation

At elevated pressures, bimolecular collisions increase, enhancing collisional deactivation because energized molecules lose energy before decomposing, hindering the attainment of the sufficient activation energy. Therefore, collisional deactivation impacts kinetics rather than limitations of energy transfer between reactants or pathways for reactions, since reactants receive surplus enough energy.

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