Chemistry 9701 · AS & A Level · Reaction kinetics

Reaction kinetics — practice question

In a Boltzmann distribution, the height of the curve’s peak shows how many molecules possess the most probable energy. A sample of gas is cooled, while the number of molecules stays the same. Which statement correctly describes a feature of the Boltzmann distribution for the gas when the temperature decreases?

  • AThe value of the most probable energy would stay the same.
  • BThe number of molecules with the most probable energy would increase.
  • CThe area under the molecular energy distribution curve would decrease.
  • DThe number of molecules at the very high energy end of the distribution would stay the same.

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