Three different single-step reactions occur at the same temperature with the…

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

Problem

Three different single-step reactions occur at the same temperature with the following activation energies: • Reaction A:

E_a = 50\,\text{kJ}

• Reaction B:

E_a = 80\,\text{kJ}

• Reaction C:

E_a = 30\,\text{kJ}

Assuming identical pre-exponential factors, which ranking lists the reactions in order of increasing rate constant

k

? (a)

C < B < A

(b)

B < A < C

(c)

C < A < B

(d)

A < B < C