O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2011 · Q191 Mark

Substances can change from one state to another as shown. For substances to change from one state to another, there must be some energy transfer. Which changes involve the substance taking in energy and which changes involve the substance giving out energy?

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Aenergy taken in: 1 and 2, energy given out: 3 and 4

Benergy taken in: 1 and 3, energy given out: 2 and 4

Cenergy taken in: 2 and 4, energy given out: 1 and 3

Denergy taken in: 3 and 4, energy given out: 1 and 2

✓ Correct answer

A: energy taken in: 1 and 2, energy given out: 3 and 4

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2011 Paper 1 Variant 1, question 19.

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