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Help can anyone answer my question

  1. May 13, 2005 #1
    help!!!!can anyone answer my question!!!!!!!!!

    it is the experiment that i did in school!~
    topic:boiling point with composition for different mixtures of two miscibe liquids


    first: mixing trichloromethane and ethyl ethanoate
    so the following is the result~
    Volume of trichloromethane/cm3
    10 10 10 10 5 2 0
    Volume of ethyl ethanoate/cm3
    0 2 5 10 10 10 10
    Volume % of ethyl ethanoate
    Boiling point/0C
    60 65 70 68 67 66 63








    by plotting boiling point against volume %of ethyl ethanoate . we can see the curve rise but after drop , so why this happen !~???????????/
    can any one explain in detail ?????????????????
    help me please!~
     
  2. jcsd
  3. May 13, 2005 #2
    another

    the boiling point of mixing hexane and propanone just opposite .
    it's curve drop but rise slightly .
    why ????????
    Volume of trichloromethane/cm3
    10 10 10 10 5 2 0
    Volume of ethyl ethanoate/cm3
    0 2 5 10 10 10 10
    Volume % of ethyl ethanoate
    Boiling point/0C
    67 52 49 54 52 57 59
     
  4. May 13, 2005 #3

    GCT

    User Avatar
    Science Advisor
    Homework Helper

    It all depends on the type of solution, whether it is an ideal solution, non-ideal solution etc...this pertains to the attraction characteristics between the two components.

    If it is a ideal solution, then the mixtures will exhibit boiling point elevation with the higher boiling points exhibited by the mixture rather the the individual pure solutions (this is what you have with the trichloromethane and ethyl ethanoate), quite different for the vice versa situation.

    I'll try to explain it in more detail if you're still wondering about it.
     
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