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4 marksThermal Properties

CAPE Physics Unit 1 · 2011 · Paper 2 · Question 3(b)(ii)

A solid of mass 2.0 kg receives heat at a rate of 1.0 × 10^5 J per minute. Its temperature T (in K) during the first 45 minutes is shown in the graph on the opposite page.

Calculate the gradient of the two linear regions of the graph labelled P and Q.

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Other parts of this question

  1. 3(a)Define the term 'specific latent heat of fusion' of a substance.[1 mark]
  2. 3(b)(i)What are the values of the melting point and boiling point of the substance?[2 marks]
  3. 3(b)(iii)State, giving your reasoning, whether the specific heat capacity of the liquid is greater or smaller than that for the solid state.[2 marks]
  4. 3(b)(iv)Calculate the specific heat capacity of the substance in the liquid state.[3 marks]
  5. 3(b)(v)Calculate the specific latent heat of fusion of the substance.[3 marks]

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