1. PROPERTIES OF MATTER

2. Physical Properties
Characteristics that can be observed WITHOUT changing the identity of the substance

3. Intensive Properties
Properties that do not depend on the sample size present.
Color
Odor
Luster - How shiny a substance is.
Malleability - The ability of a substance to be beaten into thin sheets.
Ductility - The ability of a substance to be drawn into thin wires.
Conductivity - The ability of a substance to allow the flow of energy or electricity.

4. Intensive Properties
Hardness - How easily a substance can be scratched.
Melting/Freezing Point - The temperature at which the solid and liquid phases of a substance are in equilibrium at atmospheric pressure.
Boiling Point - The temperature at which the vapor pressure of a liquid is equal to the pressure on the liquid (generally atmospheric pressure).
Density - The mass of a substance divided by its volume

5. Extensive Properties
Extensive - Properties that do depend on the sample size present.
Mass - A measurement of the amount of matter in a object (grams).
Weight - A measurement of the gravitational force of attraction of the earth acting on an object.
Volume - A measurement of the amount of space a substance occupies.
Length

6. Chemical Properties
Can only be observed by changing the original substance
Have to do with the atomic or molecular composition of matter
How substances react with other substances

7. Chemical Properties
Flammability pH
Reactivity

8. Which physical property would be the same as a substance’s melting point?
Boiling point
Specific heat
Freezing point
Solubility

9. Changes in Matter
Physical: a change in any physical property of matter; NOT in the substance itself
Chemical: the change of one substance into another substance (BRAND NEW SUBSTANCE)

10. Physical Change Gas Liquid Solid Solid Liquid Gas Solid Gas Gas Solid
Changes of state (phase) of matter
Gas Liquid Solid
Solid Liquid Gas
Solid Gas
Gas Solid

11. Physical Change
Do you have the same substance that you started with?

12. Chemical Change
Chemical: the change of one substance into another substance (BRAND NEW SUBSTANCE)
Takes place on the molecular level; atoms rearranged

13. Chemical Change Signs of a chemical change Production of an odor
rotten egg
Change in temperature
endothermic/exothermic
Change in color
fruit ripens
Formation of bubbles (gas)
alka seltzer & water
Formation of solid
2 liquids form a solid (precipitate)
curdled milk

14. Chemical Change Signs are NOT conclusive evidence.
ONLY sure evidence of a chemical change is the production of a NEW substance!

15. Properties Used to ID an Unkown Substance
Physical properties:
Density
Heating properties
Solubility
Electric Properties
Magnetic Properties

16. Properties Used to ID an Unkown Substance
Chemical properties
Indicator (color change)
Gas production