A-LevelChemistryReaction kinetics9701/12 · Oct/Nov 2013 · Q61 Mark
The diagrams below show the Boltzmann distribution for air at two temperatures. The solid line represents the distribution at –20 °C. The dotted line represents the distribution at –10 °C. Which diagram is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AGraph with solid line (–20°C) peaking higher and to the left, and dotted line (–10°C) peaking lower and to the right, with the dotted line having a shorter tail on the right.
BGraph with solid line (–20°C) peaking higher and to the left, and dotted line (–10°C) peaking lower and to the right, with the dotted line having a longer tail on the right.
CGraph with solid line (–20°C) peaking lower and to the right, and dotted line (–10°C) peaking higher and to the left.
DGraph with solid line (–20°C) peaking higher and to the left, and dotted line (–10°C) peaking lower and to the right, with the dotted line having a longer tail on the right and similar area under both curves.
✓ Correct answer
D: Graph with solid line (–20°C) peaking higher and to the left, and dotted line (–10°C) peaking lower and to the right, with the dotted line having a longer tail on the right and similar area under both curves.
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