1. Physical Properties 3.4

2. Demonstration Calcium plus Water Demo
3 Balloons – Helium, Air, Hydrogen

3. Physical Properties
Physical Property: A property that can be observed without a chemical change

4. Appearances and Behavior
Appearances are physical properties
Ex. Color, Shape, State of Matter, Volume, Temperature
Behaviors of some substances are physical properties
Ex. Magnetism, ductility, malleability, conductivity

5. Physical Properties Viscosity: A substances resistance to flowing
High – Low
A rock syrup water

6. Conductivity: The ability to transfer heat or electricity

7. Malleability: Ability to be hammered without shattering

8. Hardness: Harder materials scratch softer materials

9. Physical Properties
Melting Point: The point a substance changes from a solid to a liquid

10. Boiling Point: The point a substance boils

11. Density: The ratio of mass per volume
Less dense objects float on top of more dense objects

12. Physical Properties are used to Identify a material
CSI
Choose a material for a purpose
Separate substances in a mixture
Filtration/Sifting – separates materials based on size
Distillation – separates the substances in a solution based on boiling points
Magnetism

13. Chemical Properties Chemical Properties:
Can only be observed when a substance is changing into a different substance

14. Chemical Properties
Flammability: A materials ability to burn in oxygen

15. Reactivity: A materials ability to combine and react with other chemicals

16. Others – Toxicity, Heat of Combustion, Oxidation States, Reaction to Light

17. Density Practice Problems
Density = Mass Volume

18. Practice Problem #1
What is the density of CO gas if grams occupies a volume of 100ml?