Chapter 8

Phases: Gases, Liquids, and Solids

Phase refers to whether a substance is a solid, liquid, or gas. Understanding
what, on the molecular level, affects a substance’s phase and how a substance
goes about changing from one phase to the next is necessary for the SAT
Chemistry Subject Test. This chapter will deal with both the qualitative and
quantitative aspects of phases and phase change, as well as the behavior of
gases. It will include discussions of the ideal gas equation, partial pressures,
intermolecular forces, phase change and phase change diagrams, and vapor
pressure.