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4 marksThermal Properties

CAPE Physics Unit 1 · May/June 2023 · Paper 2 · Question 3(c)(ii)

Figure 8 shows a Callender and Barnes continuous flow calorimeter. Heat is supplied at 20 V and 1.5 A and removed by water flowing at 100 g per minute.

An unknown liquid is then passed through the same calorimeter at a flow rate of 120 g per minute. To obtain the same temperature change, the electrical supply is changed to 13 V and 1.2 A. Calculate the specific heat capacity of the unknown liquid.

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Other parts of this question

  1. 3(a)(i)Outline TWO differences between boiling and evaporation.[4 marks]
  2. 3(a)(ii)Explain what is meant by the 'specific latent heat of fusion' of a substance.[2 marks]
  3. 3(b)(i)On the axes provided in Figure 7, plot a graph of temperature, θ, versus time, t. Use the graph to determine the melting point of Y.[4 marks]
  4. 3(b)(ii)For the substance Y in (b), calculate the specific latent heat of fusion if 200 g of Y is heated at a steady rate of 500 W.[5 marks]
  5. 3(c)(i)Calculate the temperature change of the water.[3 marks]
  6. 3(c)(iii)State TWO advantages and ONE disadvantage of using the continuous flow method to determine the specific heat capacity of a liquid.[3 marks]
  7. 3(d)(i)Show that the ratio of the temperature drop across each of the layers is inversely proportional to the ratio of the thermal conductivities of the layers, given…[4 marks]
  8. 3(d)(ii)State ONE application of thermal insulation, other than the application described in (d).[1 mark]

More practice: the rest of this paper · more Thermal Properties questions · all CAPE Physics Unit 1 past papers