Separation of Matter. MATTER. Can it be physically separated? (ex: filtration or evaporation ). YES. NO. Is it made up of only one type of atom on the periodic table?. Is the composition uniform throughout?. YES. NO. NO. YES. Matter is .
Can it be physically separated?
(ex: filtration or evaporation)
Is it made up of only one type of atom on the periodic table?
Is the composition uniform throughout?
Anything that has mass and takes up space (volume)
1. heterogeneous mixture
2. homogeneous mixture
Not uniform throughout. Made of very large molecules.
Uniform throughout: also called solutions: made of very small molecules.
Remember, density is tricky! While it’s a number, it’s always the same for a substance, no matter how much of it you have!
CHEMICAL AND PHYSICAL PROPERTY EXAMPLES always the same for a substance, no matter how much of it you have!
Types of physical properties!!! always the same for a substance, no matter how much of it you have!
1. Extensive physical properties
2. Intensive physical properties
DO DEPEND on the amount of matter present
DO NOT DEPEND on the amount of matter present
**Example 2: Place an I(Intensive) or E(extensive for each of the following properties:
Malleability (hammer into sheet) IMass E
Melting point IOdor I
Ability to react with acid IVolume E
Ability to react with base IClarity I
Ability to react with water IColor I
Ability to rust IConsistency I
Ability to tarnish IDensity I
Viscosity (resistance to flow) I length E
Boiling point IArea E
Ability to conduct electricityI Luster (shine) I
Dissolves in waterI Hardness I
Amount of Energy E
Ductility (ability to be molded) I
Ability to explode (combust) I
Flammability (burning) I
Physical Changes Chemical Changes
How do we know if its chemical?
A student determined that the
substance he was working with took the
shape of its container, had molecules
that moved fast and were very far apart.
He also determined that the substance
was easily compressed into a smaller
The types of phase changes include…
liquid + energy vapor (gas)
vapor liquid + energy
solid + energy liquid
liquid solid + energy
solid + energy vapor
vapor solid + energy
You will notice that all of the phase changes above either required an input of energy or they released energy. Each phase change is either:
Example 3-7. Which phase changes are exothermic?
Example 3-8. Which phase changes are endothermic?
A process that releases heat (heat exits the system)
A process that takes in heat (heat enters the system)
Condensation, Freezing, Deposition
Melting, vaporization, sublimation