Topic: Effect of temperature, Arrhenius equation, activation energy· Chemical Kinetics

Activation energy of any chemical reaction can be calculated if one knows the value of

1. rate constant at two different temperatures.

2. rate constant at standard temperature.

3. probability of collision.

4. orientation of reactant molecules during collision.

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Answer: 1. rate constant at two different temperatures.

Key idea: from the Arrhenius equation, \(\log\dfrac{k_2}{k_1}=\dfrac{E_a}{2.303R}\left(\dfrac{1}{T_1}-\dfrac{1}{T_2}\right)\).

Knowing \(k\) at two temperatures lets us solve for \(E_a\). A single rate constant, collision probability or orientation alone is not enough. Option 1.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Activation energy of any chemical reaction can be calculated if one knows the value of

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