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14.2 Specific heat capacity and latent heat

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Question 17

A vapour passes through a heat exchanger. A mass of 0.080 kg of the vapour condenses at its condensation temperature. During this process, 70% of the energy released by the vapour is transferred to 1.5 kg of water. The temperature of the water increases from 18 ∘C18\,^{\circ}\mathrm{C}18∘C to 43 ∘C43\,^{\circ}\mathrm{C}43∘C. The specific heat capacity of water is 4200 J/kg ∘C4200\ \mathrm{J/kg}\,^{\circ}\mathrm{C}4200 J/kg∘C.

Calculate the specific latent heat of vaporisation of the vapour.

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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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