Formation of Solids - Formation of Solids Low energy attractive forces pull particles into an orderly arrangement solid Freezing physical change of a

Formation of Solids - Formation of Solids Low energy...

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Formation of Solids - Low energy- attractive forces pull particles into an orderly arrangement solid - Freezing – physical change of a liquid to a solid by removal of heat, solidification I. Solids Properties of Solids and the Kinetic-Molecular Theory - more densely packed intermolecular forces are more effective o dipole-dipole, London dispersion, and hydrogen bonding stronger effects fixed positions, with vibrational movement around fixed points more ordered o Meniscus – concave liquid surface that forms in a test tube or graduated cylinder - Two types of solids o Crystalline solids – consist of crystals Crystals – substance in which particles are arranged in an orderly, geometric repeating pattern o Amorphous solid – one in which particles are arranged randomly
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Unformatted text preview: Definite Shape and Volume-Crystalline solids are geometrically regular o Do not flow because they are in fixed positions-Amorphous have definite shape but no distinct geometric shape (ex. glass)-Volume changes as pressure and temperature changes Definite Melting Point-Melting – physical change of a solid to liquid by the addition of heat-Melting point – temperature at which a solid becomes and liquid o Kinetic energies of particles overcome the attractive forces Definite melting points in crystalline solids-Amorphous → supercooled liquids – substances that retain certain liquid properties even at temperatures at which they appear to be solid...
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