Topic: Phases of Matter Do Now: ANSWER: Which pair defines…. 1. SOLID

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Presentation transcript:

Topic: Phases of Matter Do Now: ANSWER: Which pair defines…. 1. SOLID Topic: Phases of Matter Do Now: ANSWER: Which pair defines… 1. SOLID 2. LIQUID 3. GAS A> Definite Volume, Indefinite Shape B> Definite Volume, Definite Shape C > Indefinite Volume, Indefinite Shape

PHASE CHANGES – occur when the energy of the particles is changed Remove energy – Exothermic (energy exits) Add energy – Endothermic (energy IN)

(Boiling) (Solidification)

l exo s endo l endo g exo s endo g exo 1. solidification ___→ s Phase Endo or Exo 1. solidification ___→ s 2. melting ___→ l 3. vaporization ___→ g 4. condensation ___→ l 5. sublimation ___→ g 6. deposition ___→ s l exo s endo l endo g exo s endo g exo

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

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