Properties of the Liquid State: Cohesion and Adhesion

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Presentation transcript:

Properties of the Liquid State: Cohesion and Adhesion Cohesion: The intermolecular attraction between like molecules. Adhesive attraction between liquid and surface Adhesion: The intermolecular attraction between unlike molecules. Liquid Surface http://semanticparanoia.wordpress.com/files/2006/06/dew_water_droplet_on_leaf.jpg http://www.lenntech.com/periodic-chart-elements/Hg-en.htm Hg Droplet H2O Droplet Cohesive Forces > Adhesive Forces Cohesive Forces < Adhesive Forces

Properties of the Liquid State: Capillarity Adhesive Forces between glass surface and water molecules. ForceAdhesive > ForceCohesive ....Liquid climbs up tube Capillarity: Liquids filling a small tube against the pull of gravity

Properties of the Liquid State: Viscosity Viscosity: A Liquid’s resistance to flow. High Viscosity Polyglycerol Low Viscosity Water ...a thick, viscous liquid.