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3.2 Internal energy and energy transfers

3.2 Internal energy and energy transfers

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Question 5

An engineer carries out an experiment to determine the specific heat capacity of a copper crucible.

a.

The engineer measures the temperature of the crucible using a digital temperature probe. The probe's screen displays readings to one decimal place, such as 24.3∘C24.3^\circ\text{C}24.3∘C. What is the resolution of this temperature probe?

[1]
b.

To minimise thermal energy transfers to the surroundings, the copper crucible is encased in a ceramic insulating jacket. The combined mass of the crucible and the insulating jacket is measured to be 2.45 kg2.45\text{ kg}2.45 kg. The mass of the copper crucible alone is 1.85 kg1.85\text{ kg}1.85 kg. Calculate the mass of the insulating jacket.

[2]
c.

During a heating test:

  • The electrical energy transferred to the copper crucible was 28 490 J28\,490\text{ J}28490 J
  • The mass of the copper crucible was 1.85 kg1.85\text{ kg}1.85 kg
  • The temperature of the crucible increased by 40∘C40^\circ\text{C}40∘C

Calculate the specific heat capacity of copper from these experimental results. Choose and state the correct unit from the following options: J/kg\text{J/kg}J/kg, J/kg∘C\text{J/kg}^\circ\text{C}J/kg∘C, or J/∘C\text{J/}^\circ\text{C}J/∘C.

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Markscheme

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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