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Pressure inside a heated sealed vessel

  1. Aug 8, 2015 #1
    Please can you help me de find out the calculation steps leading to the partial pressure inside a heated closed vessel with 25 ml total capacity but filled 20mL with aquous mixture of 2 acids(HNO3/HF ;1/3)..I think to simplify the problem we could at a fisrt approximation assume that the mixture is water.. Experimentally we fixed the temperature to T1=80 ; 100 then 120°C.
     
  2. jcsd
  3. Aug 8, 2015 #2

    mfb

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    Staff: Mentor

    To a good approximation, the partial pressure from water will be given by the vapour/liquid boundary in the phase diagram, add the atmospheric pressure from air if you start the experiment with air inside.
     
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