A-LevelChemistryReaction kineticsMay/June 2015Paper 1 Q111 Mark
The Boltzmann distribution below shows the distribution of molecular energies in a sample of a gas at a given temperature. [Figure] Which statement correctly describes the change in such a distribution if the temperature is increased?
AFewer molecules possess the most probable energy value and this value shifts to the left.
BFewer molecules possess the most probable energy value and this value shifts to the right.
CMore molecules possess the most probable energy value and this value shifts to the left.
DThe area under the curve of the distribution increases.
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The correct answer is B. This question tests the candidate's understanding of reaction kinetics within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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