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Ch. 8 - Solids, Liquids, & Gases II. Changes in State (p ) Phase Changes Heating Curves MATTER
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 Potential Energy space between particles related to phase changes
B. Heating Curves Solid - KE Melting - PE Liquid - KE Boiling - PE Gas - KE
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 HEATING CURVE
E. Changes in State (phase changes) 1. Melting - solid to liquid a. Particles get more kinetic energy and begin rotating around each other. b. There isnt.
Changes in State. Solid to a Liquid Melting. – Where a solid changes to a liquid. – Particles must gain energy and become free to move around. Melting.
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wax water 1. When water evaporates its PE goes up so the KE (and temp.) must go down. Evaporation is a cooling process. 2. When wax freezes its PE goes.
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