1. Physical & Chemical Properties & Physical & Chemical Changes
P/C P/C

2. Physical Properties Identification Examples
Usually a measurable characteristic you can observe without changing the chemical formula or composition such as
Density (universal p.p.)
Size/Shape
Color
Temperature of phase changes
Melting point, boiling point, freezing point, condensation point
State of matter, Texture, Hardness, Odor, Conductivity, etc.
Physical Properties of Water
Density = 1.0 g/mL
Clear Liquid
Boils & 100°C
Freezes & 0°C
Physical Properties of Alcohol
Density = .789 g/mL, clear, liquid, BP/CP = 80°C, MP/FP = -114°C
Physical Properties of Iron
Solid, metallic, responds to a magnet, conducts electricity, 2750°C, etc.

3. Physical Changes Identification Examples
A change in appearance (size, shape, state) without a change in the composition (chemical make up)
Tearing/Breaking
Dissolving
Phase changes (boiling, evaporating, condensing, sublimating, depositing, melting, freezing (solidifying)
Physical Changes in Water
Water freezes to form ice
Breaking an icicle
Boiling water
Physical Changes in Alcohol
Evaporates quickly
Physical Changes in Iron
Melting iron to pour in a mold.
Magnetizing an iron bar with a blow or electromagnet.

4. Chemical Properties Identification Examples
The ability to react with other substances
Doesn’t mean it has changed but that it could in the right conditions
Must have been observed reacting in the past to know this
Flammability
Corrosivity
Toxicity (poisonous) pH
Reactvity
Chemical Properties of Water
Ability to react with metals to from bases/corrosion
Ability to react with nonmetals to form acids
Chemical Properties of Alcohol
Flammable (ability to burn)
Toxic in moderate quantities
Chemical Properties of Iron
Ability to rust.

5. Chemical Changes Identification Examples
A reaction where new (different) substances are formed
Can be written as a chemical equation
Evidence a Chemical Change occurs
Change in color (without dyes)
Change in odor
Gas is produced (no heat added)
Solids forming from liquids (precipitate)
Spontaneous change in temperature (no heat added)
Light is produced
Chemical Changes in Water
Hydrolysis separates water into hydrogen & Oxygen
Water reacting with sodium to form Sodium Hydroxide and hydrogen gas
Chemical Changes in Alcohol
Alcohol burning to form CO2 and H2O and heat
Chemical Changes in Iron
Iron combining with oxygen to from rust (Fe2O3)

6. Identification Time
Identify each of the following as either a Physical Property, Physical Change, Chemical Property or a Chemical Change:
The color of the desktops are green
Zinc has the ability to corrode when wet
Moriah broke her bumper when she hit a deer
The food I eat is converted into waste

7. Check your lab data & notes
Does a spontaneous change in temperature indicate a physical or chemical change?
Which experiments resulted in a temperature change?
Which ones were chemical? Physical? Why?
Does a spontaneous change in color indicate a physical or chemical change?
Which experiments resulted in a color change?
Which ones were chemical? Physical? Why
Does a spontaneous production of gas (bubbling) indicate a physical or chemical change?
Which experiments resulted in gas production?

8. Compare/Contrast
Physical v. Chemical
Property v. Change