Air is trapped in a rigid container of fixed volume.
The air is heated, causing its temperature to rise.
Which row in the table describes how the average speed of the air molecules and the average distance between them changes?
| Average speed of molecules | Average distance between molecules | |
|---|---|---|
| A | increases | increases |
| B | increases | unchanged |
| C | unchanged | unchanged |
| D | unchanged | increases |
Row A
Row B
Row C
Row D
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.