[CHEM 1212] - Final Exam Guide - Ultimate 24 pages long Study Guide!
Document Summary
Properties of matter are determined by the properties of molecules and atoms. Intermolecular forces - attractive forces that exist among the particles that compose matter. Intermolecular forces exist among all particles that compose matter. The state of matter ( gas, solid, liquid) depends on the magnitude of the intermolecular forces along with the amount of thermal energy. Molecules composing matter are in constant random motion that are increased with the amount of thermal energy. Increasing thermal energy with intermolecular forces = gaseous; decreasing thermal energy with intermolecular forces = liquid or solid. 11. 2 solids, liquids, and gases: a molecular comparison. Densities of solids and liquids are much greater than gases. For water, solids are slightly less dense than liquids. This is atypical behavior because molecules move closer upon freezing (solids). Ice however is a unique solid that is less dense than water because the unique crystal structure results in water molecules moving slightly apart upon freezing.
