(B) The Arrhenius equation is given by $k = A e^{-\frac{E_a}{RT}}$.As $T \to \infty$,the term $\frac{E_a}{RT} \to 0$.Therefore,$e^{-\frac{E_a}{RT}} \t

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(B) The Arrhenius equation is given by $k = A e^{-\frac{E_a}{RT}}$.As $T \to \infty$,the term $\frac{E_a}{RT} \to 0$.Therefore,$e^{-\frac{E_a}{RT}} \to e^0 = 1$.Thus,$\lim_{T \to \infty} (k) = A \times 1 = A$.Given that the Arrhenius constant $A = 2 \times 10^{15}\, s^{-1}$,the value of the rate constant as $T \to \infty$ is $2 \times 10^{15}\, s^{-1}$.

Class 12 Chemistry Chemical Kinetics Collision theory, Energy of activation and Arrhenius equation

Difficult

At $25\,^{\circ}C$,the values of rate constant,activation energy and Arrhenius constant of a reaction are $3 \times 10^{-4}\, s^{-1}$,$129\, kJ/mol$ and $2 \times 10^{15}\, s^{-1}$ respectively. The value of rate constant as $T \to \infty$ is

A
zero
B
$2 \times 10^{15}$
C
$3 \times 10^{-4}$
D
$6 \times 10^{11}$

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Chemical Kinetics

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Collision theory, Energy of activation and Arrhenius equation

Catalysts are used to increase the rate of a chemical reaction. Because it

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Activation energy for the hydrolysis of sucrose by acid is $X \ kJ \ mol^{-1}$ whereas activation energy for the hydrolysis of sucrose by sucrase is $Y \ kJ \ mol^{-1}$. $X$ and $Y$ respectively are

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The energy of activation is

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At $27^{\circ}C$ in the presence of a catalyst,the activation energy of a reaction is lowered by $10 \ kJ \ mol^{-1}$. The logarithm ratio of $\frac{k(\text{catalysed})}{k(\text{uncatalysed})}$ is .... (Consider that the frequency factor for both the reactions is the same)

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In a multistep reaction such as $A + B$ $\longrightarrow Q$ $\longrightarrow C$,the potential energy diagram is shown below. What is $E_{a}$ for the reaction $Q \longrightarrow C$?

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At $25\,^{\circ}C$,the values of rate constant,activation energy and Arrhenius constant of a reaction are $3 \times 10^{-4}\, s^{-1}$,$129\, kJ/mol$ and $2 \times 10^{15}\, s^{-1}$ respectively. The value of rate constant as $T \to \infty$ is

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Catalysts are used to increase the rate of a chemical reaction. Because it

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In a multistep reaction such as $A + B$ $\longrightarrow Q$ $\longrightarrow C$,the potential energy diagram is shown below. What is $E_{a}$ for the reaction $Q \longrightarrow C$?

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