CHEM 123N Study Guide - Comprehensive Final Exam Guide - Solvent, London Dispersion Force, Intermolecular Force
20 Nov 2018
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Document Summary
Elastic behavior of liquid surface, makes it acquire least possible surface area. Surface molecules efel different forces than interior. Molecules or atoms in the middle of a liquid are attracted equally in all directions, but molecules or atoms on the surface feel attractive forces on only one side and are thus drawn in toward the liquid. Generally, stronger imfs = greater surface tension, but this is temperature dependent. Cohesive forces = imfs that bind similar molecules to each other. Adhesive forces = imfs that bind a substance to a surface. Capillary action - rise of liquids up narrow tubes. For example, water has stronger adhesive forces with glass. [meniscus upward], whereas mercury has stronger cohesive forces [clings to itself]. Gases liquefy if enough pressure is applied, the highest t at which a gas can form a liquid if enough pressure is applied, called critical temperature. Abo(cid:376)e t sub c, (cid:258)as ca(cid:296)"t be li(cid:335)ui(cid:257)ied (cid:296)o (cid:295)atte(cid:336) ho(cid:377) (cid:295)uch p(cid:336)essu(cid:336)e is applied.
