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14.3 Gas pressure and temperature

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Question 34
H

Air is trapped in a pump at 100 kPa with a volume of 60 cm3. It is compressed rapidly to 20 cm3, and its temperature rises. No air escapes.

Using p1V1=p2V2p_1V_1=p_2V_2p1​V1​=p2​V2​, a student predicts a final pressure of 300 kPa.

Which evaluates this prediction correctly?

[1]
A

The actual pressure is smaller because the air is hotter than initially.

B

The prediction is correct because the mass of trapped air is unchanged.

C

The actual pressure is greater because the air is hotter than initially.

D

The prediction is correct because the final volume has been measured.

Markscheme

14.3 Gas pressure and temperature Questions

  1. GCSE
  2. /Physics
  3. /14.3 Gas pressure and temperature

108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.

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