Intentions for success: We will be successful when we can define the types of phase changes in matter Aug. 30, 2018 Vocab: Sublimation, Vaporization, Endothermic, Exothermic Warm up: Table salt is solid at room temperature and Acetone is a liquid at room temperature. What can we conclude about the melting points of these materials?

Warm up: Intentions for success: We will be successful when we can define the types of phase changes in matter Aug. 30, 2018 Vocab: Sublimation, Vaporization, Endothermic, Exothermic Warm up: Identify the … Boiling point Melting point Freezing point What is happening to this substance at a, b and c?

Ch. 8 - Solids, Liquids, & Gases MATTER Ch. 8 - Solids, Liquids, & Gases II. Changes in State (p.84-86) Phase Changes Heating Curves

melting point = freezing point A. Phase Changes Melting solid to liquid Freezing liquid to solid melting point = freezing point

A. Phase Changes Vaporization (boiling) liquid to gas at the boiling point Evaporation liquid to gas below the boiling point Condensation gas to liquid

A. Phase Changes Sublimation solid to gas EX: dry ice, freeze drying, iodine

A. Phase Changes

B. Heating Curves Kinetic Energy motion of particles related to temperature change Potential Energy space between particles related to phase changes

B. Heating Curves Gas - KE  Boiling - PE  Liquid - KE  Melting - PE  Solid - KE 

B. Heating Curves Look at the Graph What happens to the temperature during a phase change? What happens to the arrangement of molecules between phase changes?

B. Heating Curves Heat of Fusion energy required to change from solid to liquid some attractive forces are broken

B. Heating Curves Heat of Vaporization energy required to change from liquid to gas all attractive forces are broken EX: steam burns, sweating, and… the drinking bird Compare Evaporation and Vaporization HEATING CURVE

Warm up: Intentions for success: We will be successful when we can define the types of phase changes in matter Aug. 30, 2018 Vocab: Sublimation, Vaporization, Endothermic, Exothermic Warm up: Identify the … Boiling point Melting point Freezing point What is happening to this substance at a, b and c?

Warm up: Intentions for success: We will be successful when we can define the types of phase changes in matter Aug. 31, 2018 Vocab: Heat of Fusion, Heat of Vaporization Warm up: Identify the Phase changes of matter. What type of energy is associated with the phase changes? What energy is associated with temperature increases.