A-LevelChemistryReaction kinetics9701/12 · Oct/Nov 2014 · Q11 Mark
Which solid-line curve most accurately represents the distribution of molecular energies in a gas at 500K if the dotted-line curve represents the corresponding distribution for the same gas at 300 K?
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.
A[Diagram option: molecular energy distribution where the 500K solid curve is shifted to higher energy and is broader and lower than the 300K dotted curve.]
B[Diagram option: molecular energy distribution where the 500K solid curve is shifted to lower energy and is narrower and taller than the 300K dotted curve.]
C[Diagram option: molecular energy distribution where both 300K dotted and 500K solid curves peak at the same energy, but the 500K curve is broader.]
D[Diagram option: molecular energy distribution where the 500K solid curve is shifted to higher energy and is taller and narrower than the 300K dotted curve.]
✓ Correct answer
A: [Diagram option: molecular energy distribution where the 500K solid curve is shifted to higher energy and is broader and lower than the 300K dotted curve.]
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