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  • The rate constant, the activation energy and Arrhenius parameter of a chemical reaction at  <img alt="25^{\circ} \mathrm{C}" src="https://entrancecorner.oncodecogs.com/gif.latex?25%5E%7B%

The rate constant, the activation energy and Arrhenius parameter of a chemical reaction at  25^{\circ} \mathrm{C} are  \mathrm{x}, 10 \mathrm{x} \mathrm{kJ} / \mathrm{mol}  and 2 \mathrm{x} \mathrm{s}^{-1} . Value of rate constant at \mathrm{T} \rightarrow \infty is

Option: 1

\mathrm{x} \mathrm{s}^{-1}


Option: 2

2 \mathrm{x} \mathrm{s}^{-1}


Option: 3

\infty


Option: 4

10 \mathrm{x} \mathrm{s}^{-1}


Answers (1)

best_answer

Arrhenius equation gives the relation between Rate constant K with Temperature T.
                \mathrm{K}=\mathrm{A} \mathrm{e}^{-(\mathrm{Ea} / \mathrm{RT})}
Given that at \mathrm{T}=25^{\circ} \mathrm{C},
                     \mathrm{ A=2 x, E a=10 x, K=x }
Hence, at \mathrm{\mathrm{T} \rightarrow \infty}
\mathrm{K= (2 x) e^{-(10 x / \infty)} \\}

\mathrm{ \Rightarrow K=(2 x) \cdot e^0 \\}

\mathrm{ \Rightarrow K=2 x}

Posted by

Shailly goel

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