Section 13: Chemical or Physical Change? (On-Line Option)

Front

What is an intensive property?

Back

An intensive property is a physical property that does not depend on the amount of substance present. Examples include temperature and density.

Front

What is an extensive property?

Back

An extensive property is a physical property that depends on the amount of substance present. Examples include mass and volume.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that can only be observed during a chemical reaction. Examples include reactivity with water and flammability.

Front

What is a physical property?

Back

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

Front

What indicates a chemical change has occurred?

Back

Indicators of a chemical change include color change, gas formation, temperature change, and the formation of a precipitate.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³). It is an intensive property.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass. Mass is an extensive property.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What does it mean for a substance to react with water?

Back

If a substance reacts with water, it indicates a chemical property, as it involves a change in the substance's chemical structure.

Front

What is the boiling point?

Back

The boiling point is the temperature at which a liquid turns into vapor. It is an intensive property.