Chapter 2 “Matter and Change”. Charles Page High School Pre-AP Chemistry Stephen L. Cotton. Section 2.1 Properties of Matter. OBJECTIVES: Identify properties of matter as extensive or intensive. Section 2.1 Properties of Matter. OBJECTIVES:
Charles Page High School
Stephen L. Cotton
- Mass, volume, calories are examples
- Hardness, Density, Boiling Point
States of Matter
Result of aTemperatureIncrease?
Will it Compress?
Translate, & Rotate
Heat energy added
How to picture things in your mind.
& a Compound
Components of dyes such as ink may be separated bypaper chromatography.
Distillation:takes advantage of different boiling points.
NaCl boils at 1415 oC
Substances are either:
a) elements, or
Made of one kind
Made of more than
one kind of material
Made by a
Made by a
A change in which one or more substances are converted into different substances.
Heat and light are often evidence of a chemical change.
Each element is represented by a one or two-letter chemical symbol.
But, there are examples of these that are not chemical – boiling water bubbles, etc.
Mass is neither created or destroyed in a Chemical Reaction.
In a Nuclear Reaction there is a small amount of mass that is unaccounted for.
Some mass is converted into energy. E=mc2
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43.43 g Original mass
= 43.43 g Final mass
A magnet separates iron from sulfur. This is an example of a physical change.
A precipitate is a solid that forms and settles out of a liquid mixture.
Clues to chemical changes have practical applications.
Physical or Chemical?
A mixture of iron and sulfur is heated. The iron and sulfur react and form iron sulfide. This is an example of a chemical change.
End of Chapter 2
Matter and Change