Chemistry Chapter One
The ability of a substance to undergo a chemical reaction and to form new
substances is called a chemical property.
For example, rusting is a chemical property of
Chemical properties are observed only when a substance undergoes a chemical
A chemical change always results in a change in chemical composition of the
substances involved, such as burning, rotting, rusting, decomposing, fermenting,
exploding, and corroding.
A physical property is a quality or condition of a substance that can be observed
or measured without changing the substance’s composition.
Some examples of physical
properties are color, solubility, odor, hardness, density, melting point, and boiling point.
Such a change, which alters a given material without changing its composition, is called a
Examples of physical changes include cutting, grinding, bending,
change in temperature, dissolving, condensing, splitting, and freezing.
The formation of a gas or a solid from a liquid or the productions of a color
change are common indications that a chemical change may be taking place.
always absorbed or given off in a chemical reaction, but it is not proof.
Energy is also