1. Chapter 2 Matter and Change 2.1 Properties of Matter 2.2 Mixtures
2.3 Elements and Compounds
2.4 Chemical Reactions
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2. Do Now: What properties can you use to describe this beaker of water?
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3. State (solid, liquid, gas) Color Melting point Hardness Conductivity
Describing Matter
Physical Property – characteristic that can be observed or measured WITHOUT changing a substance’s composition
Examples:
State (solid, liquid, gas)
Color
Melting point
Hardness
Conductivity
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4. Mass - amount of matter an object contains
Describing Matter
Mass - amount of matter an object contains
Volume - space occupied by an object
Density – ratio of mass to volume
Density = mass / volume
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5. Physical Properties Intensive Properties Extensive Properties
Depend on the type of matter in a sample. Does NOT depend on the amount.
Examples:
Density
Temperature
Depend on the amount of matter in a sample.
Examples:
Mass
Volume
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6. Classify as Extensive or Intensive
Melting Point Length Boiling Point
Concentration Color Freezing Point
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7. Physical Properties Intensive Properties Extensive Properties
Depend on the type of matter in a sample. Does NOT depend on the amount.
Examples:
Density
Temperature
Melting & Freezing Points
Boiling Point
Concentration
Depend on the amount of matter in a sample.
Examples:
Mass
Volume
Length
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8. Identifying a Substance
Describing Matter
Identifying a Substance
Substance - Matter that has a uniform and definite composition
We can use intensive properties to identify a substance because every sample of a substance has identical intensive properties.
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9. Physical Properties of Some Substances
Interpret Data
Physical Properties of Some Substances
Substance
State
Color
Melting point (°C)
Boiling point (°C)
Neon
Gas
Colorless
–249
–246
Oxygen
–218
–183
Chlorine
Greenish-yellow
–101
–34
Ethanol
Liquid
–117 78
Mercury
Silvery-white
–39
357
Bromine
Reddish-brown –7 59
Water
100
Sulfur
Solid
Yellow
115
445
Sodium chloride
White
801
1413
Gold
1064
2856
Copper
Reddish-yellow
1084
2562
The states of the substances are given at room temperature.
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10. States of Matter
Copper Video
Copper Price Trend
Value of a Penny
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11. END OF 2.1
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