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?

  • A l n 𝑟 against 1𝑇
  • B 1 𝑟 against ln𝑇
  • C l n 𝑟 against ln𝑇
  • D 1 𝑟 against 𝑇
  • E 𝑟 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?

  • A 𝑅 𝑚
  • B 𝑚 𝑅
  • C 𝑚 𝑅
  • D 𝑅 𝑚
  • E 𝑚

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