At , a catalyst lowers the activation energy of a reaction from to . If the frequency…

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

Problem

At 350 K350\,\text{K}, a catalyst lowers the activation energy of a reaction from 95 kJ mol−195\,\text{kJ}\,\text{mol}^{-1} to 70 kJ mol−170\,\text{kJ}\,\text{mol}^{-1}. If the frequency factor is unaffected, by approximately what factor does the rate constant increase? (Use R=8.314 J mol−1 K−1R = 8.314\,\text{J}\,\text{mol}^{-1}\,\text{K}^{-1}.) (a) About 2×1042 \times 10^{4} (b) About 5×1015 \times 10^{1} (c) About 5×1035 \times 10^{3} (d) About 11

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