1.2 Diffusion
20. What is diffusion?
The movement of particles in constant random motion from a region of higher concentration to a region of lower concentration.
21. Why does diffusion occur faster in gases than in liquids?
Gas particles have more kinetic energy and move much faster than liquid particles, with more space between them to move through.
22. How does relative molecular mass affect the rate of diffusion of a gas?
Gases with a lower relative molecular mass diffuse faster than gases with a higher relative molecular mass.
23. Explain why a "lighter" gas diffuses faster than a "heavier" gas.
At any given temperature, particles with lower mass move faster on average than heavier particles.