1. MATTER II. Describing Matter Physical Property Physical Change
Chemical Change
Chemical Property

2. Physical Property
A characteristic of a substance that can be observed without changing its identity.
can be used to separate mixtures
EX: magnetism, density

3. Physical Change
A change in the form of a substance without changing its identity.
properties remain the same
reversible
can be used to separate mixtures
EX: dissolving, grinding

4. Chemical Change A change in the identity of a substance.
properties change
irreversible
Signs: color change, formation of a gas/solid, release of light/heat
EX: burning, rusting

5. Chemical Property
A characteristic that indicates whether a substance can undergo a specific chemical change.
EX: flammability, reactivity

6. Extensive vs. Intensive
Extensive Property
depends on the amount of matter present
Intensive Property
depends on the identity of substance, not the amount
C. Johannesson

7. Extensive vs. Intensive
Examples:
boiling point
volume
mass
density
conductivity
intensive
extensive
C. Johannesson

8. Physical vs. Chemical C. Johannesson Physical Property
can be observed without changing the identity of the substance
Chemical Property
describes the ability of a substance to undergo changes in identity
C. Johannesson

9. Physical vs. Chemical C. Johannesson Examples: melting point flammable
density
magnetic
tarnishes in air
physical
chemical
C. Johannesson

10. Physical vs. Chemical C. Johannesson Physical Change
changes the form of a substance without changing its identity
properties remain the same
Chemical Change
changes the identity of a substance
products have different properties
C. Johannesson

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

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