At 298 K the uncatalyzed hydrolysis of compound Y has a rate constant and an…

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

Problem

At 298 K the uncatalyzed hydrolysis of compound Y has a rate constant

k_{u}=2.0\times10^{-6}\,\text{s}^{-1}

and an activation energy of 88 kJ mol

^{-1}

. A solid catalyst lowers the activation energy to 60 kJ mol

^{-1}

but does not change the pre-exponential factor. What is the expected catalyzed rate constant at 298 K? (Use

R = 8.314\,\text{J mol}^{-1}\text{K}^{-1}

.) (a)

8.0 \times 10^{-4}\,\text{s}^{-1}

(b)

2.3 \times 10^{-5}\,\text{s}^{-1}

(c)

1.6 \times 10^{-1}\,\text{s}^{-1}

(d)

2.0 \times 10^{-6}\,\text{s}^{-1}