3.1 Properties of Matter

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3.1 Properties of Matter
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SUBSTANCES

• Matter with a uniform and unchanging chemical
  composition
• Can not be separated by physical means, like
  filtering, distilling, etc
• Also called a pure substance (includes elements
  compounds not mixtures)

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PHYSICAL PROPERTY

• Can be observed or measured w/o changing the
  samples composition
• Examples density, color, odor, hardness, state,
  melting point

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CHEMICAL PROPERTY

• The ability (or inability) of a substance to
  combine with or change into another substance(s)
• Usually the result of contact w/ another
  substance, electricity or thermal energy
• Does affect the chemical composition
• Examples rusting, oxidizing, burning,
  electrolysis

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EXTENSIVE VS. INTENSIVE PROPERTIES

• Extensive depends on the amount of sample (ie
  volume, mass)
• Intensive are same regardless of sample size (ie
  density, boiling point)
• Intensive are dependent on the particles in the
  substance (not amount) so are good for
  identifying substances

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STATES OF MATTER

• Identified by shape, volume and compressibility
• Vapor differs from a gas how?

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