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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?