Phases of Matter Phases of Matter Solids particles

Phases of Matter

Phases of Matter Solids: particles: tightly packed in orderly pattern particles can’t move very much vibrate back & forth

Gases: Particles: far apart move rapidly from place to place

Liquids: in between solids & gases particles have more movement than solids but are close together

Why do liquids & solids exist? What holds them together?

Kinetic Energy atoms & molecules in constant motion Temperature = measure average KE of particles in sample of matter

If temperature ↑, the average KE↑ , then average KE If temperature

Temperature vs. Phase gas & solid at same temp have same average KE but particles in these 2 phases move very differently

Types of motion Gases can move from place to place – they can tumble – they can shake

Solids can only vibrate -in a back and forth motion

Liquids can vibrate but have very hindered movement moving place to place or tumbling particles can move a little bit bump into neighbors

What is a phase change? A transition between phases There Can are 6 you name them?

1. solidification l → s 2. melting s → l 3. Vaporation l → g 4. condensation g→ l 5. sublimation s→ g 6. deposition g→ s

Melting solid →liquid

source Boiling liquid →gas

Deposition gas→solid Sublimation solid → gas

Condensation gas→liquid

Freezing liquid→solid Sublimation gas→solid

Phase Changes When substance goes from gas to condensed phase (s or l), what happens? particles get closer together and their motion slows down

Phase Changes When substance goes from solid to liquid or gas, what happens? particles move farther apart and their motion increases