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3.2 Internal energy and energy transfers

3.2 Internal energy and energy transfers

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Question 13

In a precision foundry, a high-frequency induction furnace is used to melt a sample of pure copper at its melting point.

During a test run, a mass of 45.0 g of solid copper at its melting temperature is completely converted into liquid copper.

The specific latent heat of fusion of copper is 205 000 J/kg205\,000\text{ J/kg}205000 J/kg.

Calculate the thermal energy transferred to change the state of this mass of copper. Use the equation:

energy=mass×specific latent heat \text{energy} = \text{mass} \times \text{specific latent heat} energy=mass×specific latent heat
[3]
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3.2 Internal energy and energy transfers Questions

  1. GCSE
  2. /Physics
  3. /3.2 Internal energy and energy transfers

37 exam-style questions on AQA GCSE Physics 3.2 Internal energy and energy transfers, covering 3.2.1 Internal energy, 3.2.2 Temperature changes in a system and specific heat capacity, and 3.2.3 Changes of state and specific latent heat. Each one has a worked solution and a mark scheme showing where the marks go.

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