Ch. 2.1 Properties of Matter

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Ch. 2.1 Properties of Matter
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• Classified as either extensive or intensive.
• Extensive propertiesdepend on the amount of
  matter in a substancemass, volume.
• Intensive propertiesindependent of mass and
  volumestrength, hardness, ductility, etc.

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Identifying Substances.

• Intensive properties are similar among substances
  with the same composition.
• Physical propertiesthose that can be measured or
  observed without changing the substances
  composition.

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States of Matter

• Solidshave definite shape and volume. Almost
  incompressible expand slightly when heated.
• Liquidsindefinite shape, constant volume.
  Almost incompressible expand slightly when
  heated.
• Gasestake the shape and volume of their
  container. Easily compressed.

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• Vaporgaseous state of a substance that is
  generally liquid or solid at room temperature.

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Physical Changes

• Some properties of a material change, but the
  substances composition does not change.
• Physical changes can be either reversible
  (boiling or freezing) or irreversible (cutting,
  grinding).