O-LevelPhysicsThermal Physics5054/12 · Oct/Nov 2023 · Q201 Mark

Pot X and pot Y are both in a cool room. Pot X contains hot water below its boiling point. Pot Y is identical to pot X but contains water that is kept boiling by a hotplate underneath it. What happens to the average kinetic energy of the particles in the liquid water in pot X and to the average kinetic energy of the particles in the liquid water in pot Y?

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Adecreases increases

Bdecreases does not change

Cstays the same increases

Dstays the same does not change

✓ Correct answer

B: decreases does not change

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2023 Paper 1 Variant 2, question 20.

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