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Thermodynamics of matter under pressure

  1. Jul 3, 2010 #1
    Imagine a tank with dry ice under high pressure, 150 psi or higher. A pipe carrying a fluid (with a freezing point lower than the temperature of the tank) passes through the tank with an initial temperature much higher than the tank.

    What will happen to the dry ice? I assume the temperature of the tank will rise because of the hotter fluid passing through. Will the pressure rise as well?
  2. jcsd
  3. Jul 3, 2010 #2


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    If you raise the temperature of a closed vessel the pressure will go up, no matter what's in it.
  4. Jul 3, 2010 #3
    What will happen to the dry ice?
  5. Jul 3, 2010 #4
    Please look here: pressure-temperature phase diagram of CO2:
    http://en.wikipedia.org/wiki/File:Carbon_dioxide_pressure-temperature_phase_diagram.svg" [Broken]
    If conditions are in blue region then dry ice will melt.
    In red region will remain solid.
    Last edited by a moderator: May 4, 2017
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