Section 3.2—Properties of Matter

What properties are useful or not useful in an airbag?

Physical versus Chemical Properties

Chemical PropertyPhysical Property

Can be observed or tested without

changing the atoms or molecules

In the process of observing or

testing, the atoms or molecules are

changed into different

substance(s)

Intensive and Extensive Properties

Extensive PropertyIntensive Property

Size of the sample doesn’t matter—you’d say a big

piece and a small piece were the

same with respect to this property

Size of the sample does matter—a big piece and a small

piece would be different with

respect to this property

Let’s Practice

Example:Are the

following properties are

physical or chemical?

Flammability

Boiling point

Solubility

Malleability

Reactivity with oxygen

Let’s Practice

Chemical

Physical

Physical

Physical

Chemical

Flammability

Boiling point

Solubility

Malleability

Reactivity with oxygen

Example:Are the

following properties are

physical or chemical?

Let’s Practice

Example:Are the

following properties are intensive or extensive?

Mass

Volume

Color

Flammability

Texture

Let’s Practice

Extensive

Extensive

Intensive

Intensive

Intensive

Mass

Volume

Color

Flammability

Texture

Example:Are the

following properties are intensive or extensive?