CHEM 11a Lecture Notes - Lecture 24: Intermolecular Force, Miscibility, Hexane
7 Nov 2016
School
Department
Course
Professor
Document Summary
A solution is a homogeneous mixture of two or more substances. Gas/gas, liquid/liquid, gas/liquid, solid/solid, solid/liquid solvent majority, solute minority, when solvent water aqueous. One substance is soluble in another substance if it will dissolve in it, insoluble if it will not. 3 factors affect solution formation: nature"s tendency toward mixing, the types of intermolecular forces involved, the energetic favorability of the mixing process (enthalpy of solution) After diffusing to form a homogeneous mixture, the gases will not spontaneously separate into their components. Since the gas particles in the solution do not interact with each other, mixing does not result in lower potential energy. The dispersal of energy within a system. Nature favors an increase in entropy - mixing over sorting. Intermolecular interactions can promote solution formation or prevent it. 3 types of interactions to consider: solvent - solvent interactions, solute - solute interactions, solute - solvent interactions. If one or both are strong, no solution will form.
