Question

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at $25^{o}C$ are $3.0 \times 10^{- 4}s^{- 1},$ 104.4 $kJmol^{- 1}$ and $6.0 \times 10^{14}s^{- 1}$ respectively. The value of the rate constant as $T \rightarrow \infty$ 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)

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

Answer 2

$k = Ae^{- Ea/RT}$; At $T \rightarrow \infty$ i.e., $\frac{1}{T} \rightarrow 0$;

$k = A = 6 \times 10^{14}\sec^{- 1}{}$