Chemistry 9701 · AS & A Level · Reaction kinetics

Reaction kinetics — practice question

The diagrams show different Boltzmann distributions. In diagram 1, one of the curves, P or Q, represents the higher temperature than the other curve. In diagram 2, one of the lines, X or Y, shows the activation energy for a catalysed reaction, while the other line shows the activation energy for the same reaction when it is uncatalysed. Which combination identifies the correct curve and line?

  • Ahigher temperature: P; presence of catalyst: X
  • Bhigher temperature: P; presence of catalyst: Y
  • Chigher temperature: Q; presence of catalyst: X
  • Dhigher temperature: Q; presence of catalyst: Y

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