Chemical vs. Physical Properties

A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, density, and melting point.

A chemical property is a characteristic of a substance that describes its ability to undergo a specific chemical change. Examples include reactivity with acids, flammability, and the ability to oxidize.

Aluminum has a low density.

Yeast acts on sugar and forms carbon dioxide and ethanol, demonstrating a chemical property.

The reaction between vinegar and baking soda produces carbon dioxide gas, indicating a chemical property.

Bromine has a red color.

Yes, sugar can dissolve in water, demonstrating a physical property.

Physical properties can be observed without changing the substance, while chemical properties can only be observed during a chemical reaction.

An example of a chemical change is the combustion of wood, which produces ash, carbon dioxide, and water.

Understanding physical and chemical properties helps predict how substances will behave in different situations, which is essential for applications in chemistry, biology, and materials science.