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14.2 Specific heat capacity and latent heat

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Question 35
F

A 200 W heater supplies all its energy to a liquid at its boiling point. In 3.0 min, 0.015 kg evaporates. What is the specific latent heat of vaporisation? Use E=PtE=PtE=Pt and E=mLE=mLE=mL.

[1]
A

5.4×102 J/kg5.4\times10^2\ \mathrm{J/kg}5.4×102 J/kg

B

1.2×106 J/kg1.2\times10^6\ \mathrm{J/kg}1.2×106 J/kg

C

4.0×104 J/kg4.0\times10^4\ \mathrm{J/kg}4.0×104 J/kg

D

2.4×106 J/kg2.4\times10^6\ \mathrm{J/kg}2.4×106 J/kg

Markscheme

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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