The molecules of a gas at a constant temperature, T₁, have the distribution of molecular energies shown in the diagram. [Figure showing molecular energy distribution with T1 peak] When the temperature is increased to T₂, the distribution of molecular energies changes. Which diagram correctly shows this change?
✓ Correct Answer
The correct answer is A: Graph where T₂ peak is lower and shifted to the right of T₁ peak, with T₂ curve having a longer high-energy tail. Both curves start at the origin.
📋 Examiner Report & Trap Analysis
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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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