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14.2 Specific heat capacity and latent heat

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Question 17

In a cryogenic laboratory, liquid nitrogen is vaporised inside a cooling jacket to cool a superconducting magnet coil from 293 K to 77 K.

Give two reasons why the actual mass of liquid nitrogen required to cool the coil to 77 K is greater than the calculated value of 6.2 kg.

[2]
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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

36 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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