Question

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

• A. $2.0\times {10}^{18}{s}^{-1}$
• B. $6.0\times {10}^{14}{s}^{-1}$
• C. $\infty$
• D. $3.6\times {10}^{20}{s}^{-1}$

Answer 1

Answer: (B)

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

Let us consider the equation

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

Here, $T\to \infty$

Therefore, $K=A$

$=6\times {10}^{14}se{c}^{-1}$

Every collision will be succesfull.