Chapter-12-template-2

Chapter-12-template-2 - Physical properties of liquids...

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Physical properties of liquids Physical properties of substances determined by the strength of forces between atoms/molecules of the substances Viscosity Depend on: - intermolecular force
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Viscosity Depend on: - temperature Viscosity decreases as temp increases Increasing temp results in more kinetic energy.
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Viscosities of different liquids T dependence of water’s viscosity Liquid Viscosity (Pa.s) T Viscosity (N.s/m2) Diethylether 0.36 20 10-3 Ethanol 0.80 40 0.65 . 10-3 Water 1.00 60 0.47. 10-3 Ethylene glycol 1.49 80 0.35. 10-3
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Practice : Predict which of the following liquids gas the lowest viscosity? 1. C5 H11OH = 88 g/mol 2. C6H14 = 86 g/mol 3. C7H16 = 100 g/mol 4. C6H12 = 84 g/mol
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Surface tension Surface tension : Energy required to keep a molecule at the surface. Water beads: sphere has minimum surface area Responsible for “beading” of liquids, spherical shape of rain drops-minimize surface area. Depend on
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This note was uploaded on 11/20/2011 for the course CHEM 1035 taught by Professor Jgdillard during the Fall '07 term at Virginia Tech.

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Chapter-12-template-2 - Physical properties of liquids...

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