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3 marksThermal Measurements

CSEC Physics · January 2011 · Paper 2 · Question 4(b)(ii)

In an experiment to determine the specific latent heat of ice, the following results were obtained: Initial mass of water at 30°C = 100 g, Final mass of water (initial water plus melted ice) at 20°C = 110 g. Assume the container has negligible heat capacity and that the heat lost to the surroundings is equal to the heat gained from the surroundings during the experiment.

Calculate the heat lost by the water.

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Other parts of this question

  1. 4(a)Describe how the apparatus shown in Figure 3 below may be used to show how the temperature of a substance such as naphthalene, varies during cooling. Include…[6 marks]
  2. 4(b)(i)Determine the mass of the melted ice.[1 mark]
  3. 4(b)(iii)Write down an expression for the TOTAL heat gained by the ice in melting and the melted ice in warming to 20°C.[2 marks]
  4. 4(b)(iv)Hence calculate the specific latent heat of fusion of ice. [Specific Heat Capacity of water = 4.2 Jg⁻¹ K⁻¹][3 marks]

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