Q. 133.5( 2 Votes )

# The rate constant for the first order decomposition of H_{2}O_{2} is given by the following equation:

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

(Given: )

Answer :

Oder of the reaction is first order

Also, half-life period, t_{1/2} = 200 minutes = 200 x 60 = 12000 seconds

Also, we know that, t_{1/2} = 0.693/k

k = 0.693/12000 = 5.7 x 10^{-5}

Also, ……(i)

And by Arrhenius equation,

……(ii)

Comparing (i) and (ii)

E_{a} = 1.91 x 10^{5}

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