O-LevelPhysicsThermal Physics5054/12 · May/June 2020 · Q151 Mark

A small vessel of volume 3.0 cm³ contains air at a pressure of 100 kPa. The small vessel is connected to a syringe. The piston is fully inserted into the syringe. The piston is moved slowly to the right so that the air in the syringe has a volume of 12 cm³. The temperature of the air does not change. What is the pressure of the air in the syringe?

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A20 kPa

B25 kPa

C80 kPa

D100 kPa

✓ Correct answer

A: 20 kPa

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2020 Paper 1 Variant 2, question 15.

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