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3 marksThe Kinetic Theory of Gases

CAPE Physics Unit 1 · 2011 · Paper 2 · Question 6(a)

Figure 4 shows gas in a cylinder with a piston, in thermal equilibrium at 315 K. The cylinder is thermally isolated. Initial gas volume is 2.90 × 10^-4 m^3 and pressure is 1.03 × 10^5 Pa.

Use the equation of state for an ideal gas to find the amount, in moles, of gas in the cylinder.

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Other parts of this question

  1. 6(b)(i)Explain this rise in temperature on a macroscopic scale, using the first law of thermodynamics.[3 marks]
  2. 6(b)(ii)Explain this rise in temperature on a microscopic scale, using the kinetic theory of gases.[3 marks]
  3. 6(c)Calculate the pressure of the gas after this compression.[2 marks]
  4. 6(d)The work done on the gas during the compression is 90 J. Use the first law of thermodynamics to find the increase in the internal energy of the gas during the…[1 mark]
  5. 6(e)Calculate the molar heat capacity of the gas in the container.[3 marks]

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