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Physics (AS & A Level) · May / June 2021 · Paper 13 · Question 17

9702The first law of thermodynamics

A sample of gas is sealed in a cylinder by a piston. The frictionless piston is free to move, so that the pressure of the gas remains constant at 1.80 × 10^5 Pa. The gas initially occupies a volume of 2.40 × 10^-4 m^3. The gas now does 14.4 J of work. What is the volume of the gas after doing this work?

  1. A0.80 × 10^-4 m^3
  2. B1.60 × 10^-4 m^3
  3. C3.20 × 10^-4 m^3
  4. D4.00 × 10^-4 m^3

As printed in the paper

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Correct answer: C. 3.20 × 10^-4 m^3

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