Q13 of 40 Page 1

The rate constant for the first order decomposition of H2O2 is given by the following equation:


Calculate for this reaction and rate constant k if its half-life period be 200 minutes.


(Given: )

Oder of the reaction is first order

Also, half-life period, t1/2 = 200 minutes = 200 x 60 = 12000 seconds


Also, we know that, t1/2 = 0.693/k


k = 0.693/12000 = 5.7 x 10-5


Also, ……(i)


And by Arrhenius equation,


……(ii)


Comparing (i) and (ii)


Ea = 1.91 x 105


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