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liquids,solids - liquids properties explained by...

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liquids  - properties explained by intermolecular forces viscosity - resistance of a liquid to flow o measured by timing to see how long it takes an amount of liquid to flow through a tube o poise (P) - unit of viscosity, g/cm-s o lower temperature, larger molecular weight >> lower viscosity surface tension - energy needed to increase surface area by a certain amount o cohesion - forces that bind similar molecules to each other o adhesion - forces that bind substance to a surface capillary action - rise of liquids up narrow tubes o used by plants to move water/nutrients upwards o adhesion between liquid and tube increases surface area solid structures  - either crystalline or noncrystalline (amorphous) crystalline solid - molecules arranged in well-defined arrangements o have flat surfaces, definite angles, regular shapes o brings particles in closest contact >> maximizes attractive forces o unit cells - repeating unit of a crystalline solid o
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