1.3 Chemical/Physical Changes and Properties

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include changes in size, shape, or state of matter.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the breaking and forming of bonds. Examples include rusting of iron and burning of wood.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Front

Give an example of a physical change.

Back

An example of a physical change is melting ice into water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is the reaction of vinegar and baking soda to produce carbon dioxide.

Front

What are some common indicators of a chemical change?

Back

Common indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.

Front

Can chemical changes be reversed?

Back

Chemical changes are often not easily reversible, as they result in the formation of new substances.

Front

What is an example of a reversible physical change?

Back

An example of a reversible physical change is dissolving sugar in water.