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4 marksFirst Law of Thermodynamics

CAPE Physics Unit 1 · 2012 · Paper 2 · Question 3(b)(i)

Table 2 gives data concerning the pressure, P, and volume, V, of a fixed mass of gas as it expands in a cylinder. The temperature of the gas is fixed at 300 K.

On the grid provided on page 11, plot a graph of pressure, P, against volume, V.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 3(a)Write an equation representing the First Law of Thermodynamics and state the meaning of EACH symbol used.[2 marks]
  2. 3(b)(ii)Use your graph to determine the work done by the gas during the expansion.[3 marks]
  3. 3(b)(iii)Write the ideal gas equation and use it to determine the number of moles of gas present.[3 marks]
  4. 3(b)(iv)Determine the change in internal energy of the gas.[1 mark]
  5. 3(b)(v)Determine the heat supplied to the gas during the expansion.[2 marks]

More practice: the rest of this paper · more First Law of Thermodynamics questions · all CAPE Physics Unit 1 past papers