1. II. Properties & Changes in Matter

2. B. Physical vs. Chemical Physical Property
Inherent characteristics that can be observed without altering the identity (composition) of the substance
Chemical Property
describes the ability of a substance to undergo changes in identity by either reacting with something else or decomposition.

3. Physical Properties Extensive Property
depends on the amount of matter present
Mass, length, volume
Intensive Property
depends on the identity of substance, not the amount
Density (g/ml), color, melting and boiling points

4. A. Extensive vs. Intensive
Examples:
boiling point
volume
mass
density
conductivity
intensive
extensive

5. B. Physical vs. Chemical Examples: melting point flammable density
magnetic
tarnishes in air
physical
chemical

6. B. Physical vs. Chemical Physical Change
changes the form of a substance without changing its identity
Size, shape, phase
properties remain the same
Chemical Change
changes the identity of a substance
products have different properties

7. B. Physical vs. Chemical Signs of a Chemical Change
change in color or odor
formation of a gas
formation of a precipitate (solid)
change in light or heat

8. Law of Conservation of Mass
In a chemical change, there is no change in the total mass of the substances involved.
Mass of Reactants = Mass of Products
Mercury(II)Oxide Mercury + Oxygen
100.0g  g g

9. B. Physical vs. Chemical Examples: rusting iron dissolving in water
burning a log
melting ice
grinding spices
chemical
physical