CAIE IGCSE Chemistry Temperature Pressure and Gas Particles
Practise explaining gas pressure and volume changes through particle speed, collision frequency or force and average separation at fixed conditions.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- explain higher pressure in a fixed volume by faster particles colliding more often and harder with walls
- at constant pressure, link heating to faster particles and expansion that increases their separation
- when temperature and pressure both rise at fixed volume, increase speed but keep average spacing unchanged
1.1.6—Effects of temperature and pressure on question 1
[Maximum number: 1]
A gas is heated. The pressure is kept constant.
Which statement describes the behaviour of the particles in the gas?
A
The particles move faster and become closer together.
B
The particles move faster and become further apart.
C
The particles move more slowly and become closer together.
D
The particles move more slowly and become further apart.
B
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