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  • From the rate expression for the following reactions ,determine their order of reaction and the dimensions of the rate constants.

4.1     From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.

             CH_{3}CHO(g)\rightarrow CH_{4}(g)+CO(g)\: \: Rate=k\left [ CH_{3} CHO\right ]^{3/2}

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best_answer

Given Rate = k[CH_{3}CHO]^{3/2}

therefore the order of the reaction is 3/2

and the dimension of k =Rate/[CH_{3}CHO]^{3/2}

                                     \\=molL^{-1}s^{-1}/(molL^{-1})^{3/2}\\ =molL^{-1}s^{-1}/mol^{3/2}L^{-3/2}\\ =L^{1/2}\ mol^{-1/2}\ s^{-1}

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manish

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