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II. Properties & Changes in Matter

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Presentation on theme: "II. Properties & Changes in Matter"— Presentation transcript:

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


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