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14.2 Specific heat capacity and latent heat

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Question 2

A laboratory rock sample has a mass of 1.2 kg and a specific heat capacity of 750 J kg−1 ∘C−1750\ \mathrm{J\,kg^{-1}\,{}^\circ C^{-1}}750 Jkg−1∘C−1. Its temperature is rising at 0.040 ∘C/s0.040\ ^\circ\mathrm{C/s}0.040 ∘C/s. Energy is transferred from the sample to the surroundings at a rate of 12 W. What heater power is needed to produce this temperature rise?

[1]
A

48 W48\ \mathrm{W}48 W

B

60 W60\ \mathrm{W}60 W

C

24 W24\ \mathrm{W}24 W

D

36 W36\ \mathrm{W}36 W

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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