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what happens when solids, liquids, and gases are heated/cooled?

Most expand if heated; contract if cooled. Solids, if heated high enough will melt and the liquid may occupy less volume than the solid. Likewise, liquids, if heated high enough, will boil and the volume of the vapor will be larger than the volume of the liquid phase (under the same conditions of temperature and pressusre). Liquids, if cooled enough, may freeze and the solid formed MAY occupy more volume.

  • chemistry -

    if a liquid is heated, it expands and becomes less dense.

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