For the reaction A → B at 298 K

CHEMISTRY · Single correct · A Level · Chemistry · Kinetics · Kinetics

Problem

For the reaction A → B at 298 K, the uncatalyzed activation energy is 80 kJ mol−180\,\text{kJ mol}^{-1}, whereas the catalyzed activation energy is 40 kJ mol−140\,\text{kJ mol}^{-1}. Which is the closest estimate of the factor by which the rate constant increases upon addition of the catalyst? (Use R=8.31 J mol−1 K−1R = 8.31\,\text{J mol}^{-1}\,\text{K}^{-1}.) (a) About 10410^{4} times larger (b) About 22 times larger (c) About 10710^{7} times larger (d) About 10210^{2} times larger

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