Section 3 1 Properties of Matter Substances Matter

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. 2. Extensive properties- depend upon the amount of substance 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!!