Section 3.2—Properties of Matter

1. Section 3.2—Properties of Matter What properties are useful or not useful in an airbag?

2. Physical versus Chemical Properties Physical Property Chemical Property Can be observed or tested without changing the arrangement of the atoms or molecules In the process of observing or testing, the atoms or molecules are changed into different substance(s)

3. Intensive and Extensive Properties Intensive Property Extensive Property Size of the sample doesn’t matter—with respect to this property, a big piece is the same as a small piece. Example: Water boils at 100°C at 1 atm whether you boil a cup of water or a gallon of water. Size of the sample does matter—a big piece and a small piece would be different with respect to this property – Examples: Mass, length

4. Let’s Practice Flammability Boiling point Solubility Malleability Reactivity with oxygen Example: Are the following properties are physical or chemical?

5. Let’s Practice Flammability Boiling point Solubility Malleability Reactivity with oxygen Chemical Physical Physical Physical Chemical Example: Are the following properties are physical or chemical?

6. Let’s Practice Mass Volume Color Flammability Texture Example: Are the following properties are intensive or extensive?

7. Let’s Practice Mass Volume Color Flammability Texture Extensive Extensive Intensive Intensive Intensive Example: Are the following properties are intensive or extensive?