A-LevelChemistryReaction kinetics9701/12 · Feb/Mar 2023 · Q21 Mark
The diagram shows the Boltzmann distribution for one mole of a gas. The gas takes part in a reaction with an activation energy, Ea. [Figure 2.1: Boltzmann distribution curve with y-axis "number of particles with energy, E" and x-axis "energy, E" with a point Ea marked on the x-axis and a peak P on the curve.] Which statement correctly describes the effect of an increase in temperature?
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APeak P will be higher and fewer molecules will have energy > Ea.
BPeak P will be higher and more molecules will have energy > Ea.
CPeak P will be lower and fewer molecules will have energy > Ea.
DPeak P will be lower and more molecules will have energy > Ea.
✓ Correct answer
D: Peak P will be lower and more molecules will have energy > Ea.
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