5. Kinetics and Equilibrium

Activation Energy — Quiz

Test your understanding of activation energy with 5 practice questions.

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Practice Questions

Question 1

What is the difference between the activation energy of a reaction and its overall enthalpy change?

Question 2

According to transition state theory, which assumption is made about the activated complex?

Question 3

An Arrhenius plot of $\ln k$ versus $1/T$ yields a straight line with y-intercept equal to 20. What is the pre-exponential factor $A$?

Question 4

Calculate the rate constant $k$ at $T=350\,\mathrm{K}$ for a reaction with $A=1\times10^{13}\,\mathrm{s^{-1}}$ and $E_a=50\,\mathrm{kJ/mol}$. (Use $R=8.314\,\mathrm{J/(mol\,K)}$)

Question 5

For a reaction with $E_a=75\,\mathrm{kJ/mol}$, by what factor does the rate constant increase when temperature rises from 300\,K to 310\,K?