O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2021 · Q141 Mark

The graph is the temperature-time graph for a sample of wax that is heated so that it melts. The mass of the wax is 200 g. Thermal energy is supplied to the wax at a constant rate of 12000 J/minute. What is the specific latent heat of fusion of the wax?

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A180 J/g

B240 J/g

C480 J/g

D600 J/g

✓ Correct answer

B: 240 J/g

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2021 Paper 1 Variant 1, question 14.

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