Chemical Kinetics Question 346

Question: Activation energy of a chemical reaction can be determined by

Options:

A) evaluating rate constant at standard temperature

B) evaluating velocities of reaction at two different temperatures

C) evaluating rate constants at two different temperatures

D) changing concentration of reactants

Show Answer

Answer:

Correct Answer: C

Solution:

[c] We know that the activation energy of chemical reaction is given by formula $ =\frac{k_2}{k_1}=\frac{E_{a}}{2.303R}( \frac{T_2-T_1}{T_1T_2} ) $ , where $ k_1 $ is the rate constant at temperature $ T_1 $ and $ k_2 $ is the rate constant at temperature $ T_2 $ and $ {E_{a}} $ is the activation energy. Therefore activation energy of chemical reaction is determined by evaluating rate constant at two different temperatures.



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