The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at 25°C are 3.0 × 10^-4 s^-1, 104.4 kJ/mol and 6.0 × 10^14 s^-1, respectively. The value of the rate constan

Question

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at 25°C are 3.0 × 10^-4 s^-1, 104.4 kJ/mol and 6.0 × 10^14 s^-1, respectively. The value of the rate constant as T → ∞, is

Prashant Kotian · Accepted Answer

Correct answer: B. According to the Arrhenius equation: K = A*e^(-E_a/RT). When temperature T approaches ∞ (T → ∞): E_a/(RT) -> 0 => e^(-E_a/RT) -> e^0 = 1. Consequently, K -> A. Given that the Arrhenius parameter (pre-exponential factor) A = 6.0 × 10^14 s^-1, the rate constant as T → ∞ approaches 6.0 × 10^14 s^-1.

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