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Question

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at 25C are x,10x kJ/mol and 2x s1. The value of the rate constant as T is:

A
x s1
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B
2x s1
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C
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D
10x s1
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Solution

The correct option is B 2x s1
A change in temperature changes only the rate constant of the reaction whilst other parameters like activation energy and arrhenius parameter remain the same.
At 25oC,
Rate constant k=AeEaRT
x=2xe10xR×298
At T=
k=2xeEaR=2x s1
(T, 1T0)

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