Chemistry of Petroleum 3: Distillation of Hydrocarbons
B. Physical Science
For Grades: 9-12
Structure and Properties of Matter
Solids, liquids, and gases differ in the distances and angles between molecules or atoms and therefore the energy that binds them together. In solids the structure is nearly rigid; in liquids molecules or atoms move around each other but do not move apart; and in gases molecules or atoms move almost independently of each other and are mostly far apart.