Section 3.1 Properties of Matter

Substances Matter that has a uniform and unchanging composition Pure composition Examples: table salt and water

Physical Properties of Matter Characteristic that can be observed and measured without changing composition Good for describing substances Examples: Density Color Odor Taste Melting Point Boiling Point

Physical Property Chart

Two Types of Physical Properties 1.Extensive properties- depend upon the amount of substance 2.Intensive properties- independent of the amount of substance

Extensive or Intensive? Mass Density Length Boiling Point Which is better for identifying unknown substances?

Chemical Properties of Matter The ability of a substance to combine with or change into one or more other substances

Chemical Properties Chart

States of Matter Solid Liquid Gas

Solid Definite shape and volume Tightly packed particles Expands when heated Not necessarily hard or rigid

Liquid Flowing matter Constant volume Takes shape of container Particles are not as tightly packed Particles can move past each other

Gas Matter that flows to conform to the shape of its container Fills entire container’s volume Particles are not tightly packed Easily compressed

Gas vs. Vapor Gas  Substance naturally in the gaseous state at room temperature »Carbon Dioxide Vapor  Gaseous state of substance that is solid or liquid at room temperature »Steam

States of Matter

Homework 1-5 on page 60 This will be handed in and graded!!