A first order reaction requires activation energy of

CHEMISTRY · Subjective · A Level · Chemistry · Kinetics · Kinetics

Problem

A first order reaction

A \to B

requires activation energy of

70 \text{ kJ mol}^{-1}

. When a 20% solution of

A

was kept at

25^\circ\text{C}

for 20 minute, 25% decomposition took place. What will be the per cent decomposition in the same time in a 30% solution maintained at

40^\circ\text{C}

? Assume that activation energy remains constant in this range of temperature. (IIT 1993)