Worksheet: Arrhenius Plots

In this worksheet, we will practice estimating activation energies and frequency (preexponential) factors from Arrhenius plots of reaction rate.

Q1:

A reaction was performed repeatedly with the same reactant concentrations but different reaction temperatures, 𝑇. The initial rate 𝑟 was measured for each reaction. Which of the following graphs could be used to estimate the activation energy of the reaction?

  • Aln𝑟 against 1𝑇
  • B1𝑟 against ln𝑇
  • Cln𝑟 against ln𝑇
  • D1𝑟 against 𝑇
  • E𝑟 against 1𝑇

Q2:

The rate constant for a reaction, 𝑘, was measured over a range of reaction temperatures, 𝑇. The data were plotted on a graph of ln𝑘 against 1/𝑇. What is the activation energy for the reaction in terms of the slope of the plot 𝑚?

  • A𝑅𝑚
  • B𝑚𝑅
  • C𝑚𝑅
  • D𝑅𝑚
  • E𝑚

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