Lecture 9

Lecture 9 - 5.2 The Liquid State Compressibility Viscosity...

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General, Organic and Biochemistry 7 th Edition 5.2 The Liquid State Compressibility Viscosity Surface Tension Vapor Pressure of a Liquid van der Waals Forces Hydrogen Bonding 5.3 The Solid State Properties of Solids Types of Crystalline Solids Sublimation of Solids
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5.2 The Liquid State Compressibility Liquids are practically inc ompressible Viscosity - a measure of a liquid s resistance to flow A function of inter-molecular attractive forces and molecular geometry Flow occurs because the molecules can easily slide past each other • Glycerol - example of a very viscous liquid Viscosity decreases with increased temperature Surface tension - a measure of the attractive forces exerted among molecules at the surface of a liquid Surface molecules are surrounded and attracted by fewer liquid molecules than those below Net attractive forces on surface molecules pull them downward • Results in beading Surfactant - substance added which decreases the surface tension,
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Vapor Pressure of a Liquid Kinetic theory - liquid molecules are in continuous motion, with their average kinetic energy directly proportional to the Kelvin temperature Average molecular kinetic energy increases as does temperature
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Lecture 9 - 5.2 The Liquid State Compressibility Viscosity...

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