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14.2 Specific heat capacity and latent heat

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Question 26

A laboratory tests a pure phase-change material used in a temperature-controlled container. An electric heater of power 50 W melts 0.180 kg of the material in 14.0 min. The material is initially at its melting point.

During the test, 6.0 kJ of the energy supplied by the heater is transferred to the surroundings.

Calculate the specific latent heat of fusion of the material.

Use Q=mLQ=mLQ=mL.

[3]
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14.2 Specific heat capacity and latent heat Questions

  1. GCSE
  2. /Physics
  3. /14.2 Specific heat capacity and latent heat

110 exam-style questions on Edexcel GCSE Physics 14.2 Specific heat capacity and latent heat, covering 14.2.1 Heating, temperature and changes of state, 14.2.2 Specific heat capacity and specific latent heat, 14.2.3 Specific heat capacity calculation, 14.2.4 Specific latent heat calculation, and 14.2.5 Reducing energy transfer through thermal insulation. Each one has a worked solution and a mark scheme showing where the marks go.

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