CH-571
Factors affecting diffusion
Chemistry · Secondary 3 · Hard · Factors affecting diffusion
A sample of gas X is collected over water at 25 °C. The volume of gas X is 80 cm³. When cooled to 5 °C at the same pressure, its volume becomes 72 cm³. Which statement best explains this change in volume in terms of kinetic particle theory?
- Particles gain kinetic energy and move further apart.
- Particles lose kinetic energy and move closer together.
- Number of particles decreases as some disappear.
- Size of each particle becomes smaller when cooled.
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