Physical

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Physical Chemical Properties of Matter
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Physical Properties

• Physical property any characteristic that can
  be observed without changing the composition of
  the substance

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Examples of Physical Properties

• Viscosity a liquids resistance to flowing
• High viscosity thicker, slower flow
• Conductivity ability to allow heat to flow
• Metals high conductivity
• Nonmetals low conductivity
• Malleability ability to be shaped with a hammer
• Metals malleable
• Nonmetals nonmalleable (brittle)
• Hardness

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Examples, cont.

• Melting point temperature at which a solid
  changes into a liquid (Still same substance)
• Boiling point temperature at which a liquid
  changes to a gas (Still same substance)
• Density mass/volume (heavy vs light)

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Using Physical Properties

• Used to identify unknown materials
• Ex used in forensics to solve crimes
• Used to choose appropriate material for a job
• Used to separate mixtures
• Filtration separates materials based on
  particle size (best with heterogeneous mixtures)
• Distillation separate solutions based on
  boiling points

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Chemical Properties

• Chemical property produces a change in the
  composition of the matter

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Chemical Properties

• Flammability materials ability to burn in the
  presence of oxygen
• Reactivity ability to combine chemically with
  another substance

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Recognizing Chemical Changes

• A change in color (brief video)
• Production of a gas (bubbles video)
• Formation of a precipitate (brief precipitation
  video)
• Precipitate a solid that forms and separates
  from a liquid

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Physical vs Chemical Change

• Physical change occurs when some properties of
  a material changes, but substances in the
  material stays the same
• Example melting of ice
• Chemical change substance reacts and forms a
  new substance
• Example rusting of a nail