The particulate nature of matter
No description yet. This curated deck is ready for daily study.
Card preview (5)
What is diffusion?
the movement of particles from a region of high concentration to a region of lower concentration
What is Brownian motion?
random molecular bombardment of large visible particles by molecules, atoms or ions
Where is evidence for Brownian motion?
Observations of the motion of tiny visible particles suspended in liquids or gases
Why is rate of diffusion dependent on molecular mass?
Greater the molecular mass => heavier the molecule Molecules with lower mass move faster than those with higher mass Lighter molecules diffuse faster than heavier molecules
What is the kinetic theory? (3)
• All matter consists of particles • There are forces of attraction between the particles • Particles possess kinetic energy to vibrate and move