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Termodynamics: saturation pressure vs total air pressure

  1. Dec 4, 2014 #1

    I have a question.
    The experiment goes like this. i hermetically close air and chloroform at standard pressure. now i want to calculate the end pressure of gas mixture after chloroform vapor gets saturated.

    is it as simple as adding up the chloroform saturated pressure to the starting air pressure?
    or do i have to take into account a change in the saturated pressure because of the change in the total pressure?

    general direction and some formulas will be very appreciated :)

    thank u
  2. jcsd
  3. Dec 4, 2014 #2
    Yes, it's as simple as adding the chloroform vapor pressure to the starting air pressure.

  4. Dec 4, 2014 #3
    great! tnx :)

    what about calculating the saturated pressure regarding a certain atmospheric pressure? i know it varies considerably for water vapor...

    thank u
  5. Dec 4, 2014 #4


    User Avatar

    Staff: Mentor

    Saturation pressure is a function of temperature and is read from a table.
  6. Dec 4, 2014 #5
    I don't understand your question.
  7. Dec 5, 2014 #6
    its just a product of my misconception :)

    i thought that saturated pressure of chloroform varies with the total pressure of the air+chloroform mixture. and of course it doesnt, because there is same pressure in the liquid as in the vapor.

    thank u :)
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