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What is the value of rate constant at ex...

What is the value of rate constant at extremely high temperature `(=oo)` ? It this rate constant feasible ? Why or why not ?

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At `T=oo,k="A e"^(-E_(a)//RT)="A e"^(0)=A`, i.e., Rate constant = collision frequency which is not feasible as explained in Q. 23.
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