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2.1 Kinetic particle model of matter

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Question 39
a.

Identify the state of matter (solid, liquid, or gas) corresponding to each of the following descriptions:

  • State X: Molecules vibrate about fixed positions.
  • State Y: Molecules are packed closely together but can move around and slide past one another.
  • State Z: Molecules are far apart and move freely and rapidly in all directions.
[3]
b.

A sealed, rigid steel canister contains helium gas. The temperature of the helium gas inside the canister is increased.

Describe how the increase in temperature affects the motion of the helium atoms.

[1]
c.

State how the pressure of the helium gas changes, and explain this change in terms of the collisions of the atoms with the canister walls.

[3]
d.

A liquid-in-glass thermometer consists of a reservoir bulb containing a liquid and a narrow capillary tube.

State the name of a liquid (other than mercury) that is commonly used in these thermometers.

[1]
e.

Describe and explain what happens to the liquid in the thermometer as the temperature increases.

[2]
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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