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The rate constant, the activation energy and the Arhenius parameter (A) of a chemical reaction at  25^{\circ} \mathrm{C}  are  3.0 \times 10^{-4} \mathrm{sec}^{-1}, 104.4 \mathrm{~kJ} \mathrm{~mol}^{-1}  and  6.0 \times 10^{-4} \mathrm{sec}^{-1}  respectively the value of the rate constant  \mathrm{T \rightarrow \infty}  is

Option: 1

3.0 \times 10^{-4} \mathrm{sec}^{-1} \\


Option: 2

6.0 \times 10^{-4} \mathrm{sec}^{-1} \\


Option: 3

10.4 \times 10^{-4} \mathrm{sec}^{-1}


Option: 4

None of the above


Answers (1)

best_answer

As per Arrhenius equation, rate constant \mathrm{K}=\mathrm{Ae} \mathrm{e}^{-\mathrm{E} / \mathrm{RT}}
\mathrm{ \text { At } T \rightarrow \infty, E_a / R T \rightarrow 0 }
\mathrm{ \Rightarrow K=A e^{-E a / R T}=A e^0=A}
\mathrm{ \Rightarrow \mathrm{K}=6.0 \times 10^{-4} \mathrm{sec}^{-1}}

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Ajit Kumar Dubey

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