3.2 Physical and Chemical Properties and Changes. All matter has both physical and chemical properties. Matter may undergo physical or chemical changes. These changes depend on their physical and chemical properties. The compression of propane gas into liquid propane is a physical change.
Physical changes are reversible.
A chemical change is synonymous to a chemical reaction. A chemical change involves changes in the elemental composition of matter. A physical property is any property other than a chemical property and includes color, density, freezing point, melting point, boiling point, specific heat or heat capacity, and solubility among others. Chemical properties are expressed by chemical equations. Both physical and chemical properties can be predicted based on the elemental composition and the structure of a substance.