CHEM103 Chapter Notes - Chapter 12: Thermal Expansion, Phase Diagram, Intermolecular Force

• School: University of Alberta
• Department: Chemistry
• Course: CHEM103
• Professor: John Veinot

Document Summary

Chapter 12 intermolecular forces: liquids, solids, and phase changes. Great solvent power results from its polarity and h-bonding ability: Dissolves ionic compounds through ion-dipole forces that separate the ions from the solid and keep them in solution. Dissolves polar nonionic substances, such as ethanol and glucose, by h- bonding. Dissolves nonpolar atmospheric gases to a limited extent through dipole- induced dipole and dispersion forces. Thermal properties of water: specific heat capacity. Water has so many strong h-bonds, so its specific heat capacity is higher than any common liquid: heat of vaporization. Numerous strong h-bonds give water a very high heat of vaporization. H-bonding also responsible for water"s high surface tension and high capillarity. High capillarity = water rises through the tiny spaces b/w soil particles, so plant roots can absorb deep groundwater during dry periods. In the solid state, the tetrahedral pattern of h-bonding leads to the hexagonal, open structure of ice.