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Question

The pre-exponential factor in the Arrhenius equation of a second order reaction has the units:

A
mol L1s1
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B
L mol1s1
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C
s1
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D
Dimensionless
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Solution

The correct option is C L mol1s1
We know for rate constant,

k=AeEa/RT ----------- 1

Since eEa/RT is dimensionless

So unit of A= Unit of k.

For second order reaction unit of A is L.mol1s1.

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