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4 marksFirst Law of Thermodynamics

CAPE Physics Unit 1 · 2017 · Paper 2 · Question 3(b)(i)

Table 2 shows the variation of pressure, P, and volume, V, for a fixed mass of an ideal gas as it expands in a cylinder. The temperature of the gas is fixed at 300 K.

On the grid provided in Figure 4 (page 13), plot a graph of pressure, P, against volume, V.

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Other parts of this question

  1. 3(a)Write an equation to represent the first law of thermodynamics. State the meaning of EACH symbol used.[2 marks]
  2. 3(b)(ii)Use the graph, to determine the work done by the gas during expansion.[3 marks]
  3. 3(b)(iii)Use the ideal gas equation to determine the number of moles of gas present.[2 marks]
  4. 3(b)(iv)Comment on the change in the internal energy of the gas.[2 marks]
  5. 3(b)(v)Determine the quantity of heat that is absorbed by the gas during expansion.[2 marks]

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