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
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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.
