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2.1 Kinetic particle model of matter

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Question 180

A gas is contained in a sealed, rigid vessel. The temperature of the gas is decreased.

What happens to the average speed of the gas molecules and what happens to the total internal energy of the gas? (Assume the gas behaves as an ideal gas.)

A

Average speed decreases; total internal energy decreases

B

Average speed decreases; total internal energy remains constant

C

Average speed remains constant; total internal energy decreases

D

Average speed remains constant; total internal energy remains constant

Markscheme

2.1 Kinetic particle model of matter Questions

  1. IGCSE
  2. /Physics
  3. /2.1 Kinetic particle model of matter

321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.

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