SC-390
Particle model of matter
Lower Sec Science · Secondary 1 · Hard · Particle model of matter
A gas syringe contains ethanol vapour at . The plunger is pushed in and the gas volume decreases. In terms of particles, which statement best explains why the pressure of the gas increases?
- Particles become larger and hit the walls harder.
- Particles move closer together and collide with the walls more often.
- New particles are formed, so there are more collisions.
- Particles stop moving and build up at the walls.
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