# (a) A first order reaction, A A B , requires activation energy of 70 kJ mol 1 . When a 20% solution

(a) A first order reaction, A A B , requires activation energy of 70 kJ mol1. When a 20% solution of A was kept at 25C for 20 minutes, 25% decomposition took place. What will be the percent decomposition in the same time in a 30% solution maintained at 40C? Assume that activation energy remains constant in this range of temperature. (b) Two reactions (i) A A products (ii) B A products, follow first order kinetics. The rate of the reaction (i) is doubled when the temperature is raised from 300 K to 310 K. The half-life for this reaction at 310 K is 30 min. At the same temperature B

(a) A first order reaction, A A B , requires activation energy of 70 kJ mol1. When a 20% solution of A was kept at 25C for 20 minutes, 25% decomposition took place. What will be the percent decomposition in the same time in a 30% solution maintained at 40C? Assume that activation energy remains constant in this range of temperature. (b) Two reactions (i) A A products (ii) B A products, follow first order kinetics. The rate of the reaction (i) is doubled when the temperature is raised from 300 K to 310 K. The half-life for this reaction at 310 K is 30 min. At the same temperature B decomposes twice as fast as A. If the energy of activation for the reaction (ii) is half of that of reaction (i), calculate the rate constant of the reaction (ii) at 300 K.

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