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Question
From the rate expression for the following reaction, determine the order of reaction and the dimension of the rate constant.
\[\ce{CH3CHO_{(g)} -> CH4_{(g)} + CO_{(g)}}\] Rate = k [CH3CHO]3/2
Solution
Given rate = k [CH3CHO]3/2
Therefore, order of reaction = `3/2`
Dimension of k = `"Rate"/["CH"_3"CHO"]^(3/2)`
= `("mol L"^-1 "s"^(-1))/("mol L"^(-1))^(3/2)`
= `"L"^(1/2) "mol"^(-1/2) "s"^(-1)`
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