Chemical changes involve a molecular rearrangement of substances, resulting in the formation of new substances with different chemical properties. This often involves the breaking and forming of chemical bonds. Physical changes, on the other hand, do not involve any change in the chemical composition of substances. These changes only affect the physical properties, such as shape, size, and state of matter. While both types of changes can cause alterations in the appearance of substances, only chemical changes bring about a new substance with different properties.
