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Chemical and Physical Properties of Matter

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					Chemical and Physical
 Properties of Matter
       Notes 7
Definitions of Properties
• Physical properties can be observed
  without chemically changing matter.



• Chemical properties describe how a
  substance interacts with other
  substances.
 Examples of Properties
PHYSICAL        CHEMICAL
    Color
    Odor           Reactivity
   Phase         Combustibility
   Luster        Flammability
   Shape            Rusting
 Malleability      Corroding
  Ductility         acidity
  Density
   Shape
  solubility
           PROPERTIES
• Intensive A property that does not change
  when the amount of sample changes.
  Examples are density, pressure,
  temperature, color.
• Extensive A property that changes when
  the amount of matter in a sample changes.
  Examples are mass, volume, length, and
  charge
                       EXAMPLE




Mass of water             100.0 g     10.0 g


Volume of water           0.100 L     0.010 L


Temperature of water      25 °C       25 °C


Density of water         1.00 g/mL   1.00 g/mL
  Density: mass divided by the
    volume of a substance
• Density = mass / volume

• Unit: g/ml or g/cm3

                        M



                    D       V
          SPECIFIC GRAVITY
 • Specific Gravity: has no units!!

 • Specific gravity is the density of a substance
   relative to some reference substance: ( usually
   compared to water.



                                     density of substance
Specific gravity =        density of reference substance

				
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