For a first order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation log k = –(2000) $\dfrac{1}{T}$ + 6.0. The pre–exponential factor A and the activation energy Ea, respectively, are

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Q:17

For a first order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation log k = –(2000) $\dfrac{1}{T}$ + 6.0. The pre–exponential factor A and the activation energy E_a, respectively, are

1.0 × 10⁶ s^–1 and 9.2 kJmol^–1

6.0 s^–1 and 16.6 kJmol^–1

1.0 × 10⁶ s^–1 and 16.6 kJmol^–1

1.0 × 10⁶ s^–1 and 38.3 kJmol^–1

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t_1/4 can be taken as the time taken for the concentration of a reactant to drop to 3/4 of its initial value. If rate constant for a first order reaction is k, then t_1/4 can be written as

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