O-LevelPhysicsThermal Physics5054/12 · May/June 2015 · Q191 Mark

Which diagram represents the change in the arrangement of the molecules in a solid as the substance melts?

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Afrom an ordered, close-packed arrangement to a disordered, close-packed arrangement

Bfrom an ordered, close-packed arrangement to a disordered, widely-spaced arrangement

Cfrom an ordered, close-packed arrangement to a slightly expanded, ordered arrangement

Dfrom an ordered, close-packed arrangement to a slightly expanded, ordered arrangement

✓ Correct answer

A: from an ordered, close-packed arrangement to a disordered, close-packed arrangement

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2015 Paper 1 Variant 2, question 19.

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