Two second order reactions given below having identical frequency factors :

CHEMISTRY · Subjective · AP · Chemistry · Kinetics · Kinetics

Problem

Two second order reactions given below having identical frequency factors : (i)

A \longrightarrow \text{Product}

(ii)

B \longrightarrow \text{Product}

The

E_a

for first reaction is

10.46 \text{ kJ/mol}^{-1}

more than that of

B

. At

100^\circ\text{C}

, the reaction (i) is 30% completed after 60 minute when initial concentration of

A

0.1 \text{ mol dm}^{-3}

. How long will it take for reaction (ii) to reach 70% completion at the same temperature if initial concentration of

B

0.05 \text{ mol litre}^{-1}