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Ch. 8 - Solids, Liquids, & Gases II. Changes in State (p.224-227) 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
Phase Changes. A PHASE CHANGE is a reversible physical change that occurs when a substance changes from one state of matter to another The temperature.
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Solid phase (s): Strong attractive forces hold particles in fixed location. Regular definite geometric shape; crystalline Liquid phase (l): Particles have.
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I. Kinetic Molecular Theory KMT. Assumptions of KMT All matter is composed of tiny particles These particles are in constant, random motion. Some particles.
Energy and Phase Changes. Energy Requirements for State Changes To change the state of matter, energy must be added or removed.
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Phase Changes What did one water molecule say to another water molecule about vapor? Don’t worry it’s just a phase he’ll cool down.
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