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3.3 Particle model and pressure

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Question 3
F

Figure shows a sealed syringe containing air. A student pushes the plunger in slowly until the volume of the air is halved. The temperature of the air does not change.

Figure: a sealed syringe containing air, with the plunger being pushed in

image

a.

Explain why the pressure of the air increases as the plunger is pushed in.

[3]
b.

The plunger is then held still and the air inside the syringe is warmed. Write down what happens to the pressure of the air.

[1]
c.

The student says that the molecules of air become smaller when the plunger is pushed in. Explain why the student is wrong.

[2]
Markscheme

3.3 Particle model and pressure Questions

  1. GCSE
  2. /Physics
  3. /3.3 Particle model and pressure

40 exam-style questions on AQA GCSE Physics 3.3 Particle model and pressure, covering 3.3.1 Particle motion in gases, 3.3.2 Pressure in gases, and 3.3.3 Increasing the pressure of a gas (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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