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Ideal solution

  1. Jul 15, 2014 #1
    Why there no change in volume and enthalpy of solution when two components are mixed
  2. jcsd
  3. Jul 16, 2014 #2
    What is the definition of an ideal solution?
  4. Jul 16, 2014 #3
    Solution which follows raoutlts law over all range of concenteration.
  5. Jul 16, 2014 #4
    And its components are of same nature
  6. Jul 16, 2014 #5
    An ideal solution is one for which the change in volume and enthalpy upon mixing are zero. Raoults law follows indirectly from this. Many combinations of real species exhibit behavior close to ideal solution behavior.

  7. Jul 16, 2014 #6
    So my question is why enthalpy or volume doesnt change
  8. Jul 16, 2014 #7
    If you mix two volumes of the same liquid, the total volume doesn't change, and there are no heat effects because the molecular interactions don't change. If you mix two liquids whose molecules are very similar, the volume and enthalpy will change very little, because the energetic interactions between the molecules of the solution will be very similar to those of the original pure liquids. For more details on this, see Smith and Van Ness, intro to chem engg thermo.

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