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  • The rate constant, 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%5Ccirc%7D%20%5C

The rate constant, activation energy and Arrhenius parameter of a chemical reaction at 25^{\circ} \mathrm{C} are 8.0 \times 10^{-6} \mathrm{~s}^{-1}, 10.4 \mathrm{~kJ} \mathrm{~mol}^{-1} and 9.0 \times 10^{19} \mathrm{~s}^{-1} respectively. The value of the rate constant as \mathrm{T}\rightarrow \infty is

 

Option: 1

\mathrm{2.0 \times 10^{18} \mathrm{~s}^{-1}}


Option: 2

\mathrm{9.0 \times 10^{19} \mathrm{~s}^{-1}}


Option: 3

Infinity


Option: 4

3.6 \times 10^{30} \mathrm{~s}^{-1}


Answers (1)

best_answer

\begin{gathered} \mathrm{K=A e^{-E_a / R T} }\\ \\\mathrm{T \rightarrow \infty} \\ \\\because \mathrm{ \frac{-E_q}{R_T} \rightarrow 0} \\ \\\mathrm{e^{-E_a / R T} \rightarrow 1}\\ \end{gathered}

\\\therefore \quad \mathrm{k \rightarrow A} \rightarrow \text{Arrhenies Parameter}\\ \\\begin{aligned} \\\because \text{A} & =9.0 \times 10^{19} \mathrm{~S}^{-1} \\ \\\therefore \quad \text{k} & =9 \times 10^{-19} \mathrm{~S}^{-1} \end{aligned}

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Rishi

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