Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below.
If the overall rate constant of the above transformation (k) is given as
$k = \frac{k _{1} k _{2}}{k _{3}}$
is 400 kJmol^-1 , then the value of Ea₃ is ______ kJ mol^-1(nearest integer)

Question

Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below.

If the overall rate constant of the above transformation (k) is given as

$k = \frac{k _{1} k _{2}}{k _{3}}$

is 400 kJmol^-1 , then the value of Ea₃ is ______ kJ mol^-1(nearest integer)

TestHub · Accepted Answer

k = k 3 ​ k 1 ​ k 2 ​ ​ A e RT − E 3 ​ ​ = A 3 ​ e RT − E a 3 ​ ​ ​ A 1 ​ e RT − E a 1 ​ ​ ​ A 2 ​ e RT − E a 2 ​ ​ ​ ​ A e RT − E 9 ​ ​ = A 3 ​ A 1 ​ A 2 ​ ​ e RT − ( E a 1 ​ ​ + E a 2 ​ ​ − E a 3 ​ ​ ) ​ ​ E a ​ = E a 1 ​ ​ + E a 2 ​ ​ − E a 3 ​ ​ ​ ​ ​ 400 = 300 + 200 − E a 3 ​ ​ E a 3 ​ ​ = 100 k J / m o l e

Chemistry - Chemical Kinetics Question with Solution | TestHub

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