Question

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at ${25}^{\circ }C$ are $3.0\times {10}^{-4}{s}^{-1},104.4kJmo{l}^{-1}$ and $6.0\times {10}^{14}{s}^{-1}$ respectively. The value of the rate constant at $T\to \infty$ is:

• A. $2.0\times {10}^{18}{s}^{-1}$
• B. $6.0\times {10}^{14}{s}^{-1}$
• C. Infinity
• D. $3.6\times {10}^{30}{s}^{-1}$

Answer 1

Answer: (B)

$6.0\times {10}^{14}{s}^{-1}$

$k=A{e}^{\frac{-E_a}{RT}}$

At $T\to \infty$

$K=A$

$K=6\times {10}^{14}$ and every collision is successful