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Physical equilibria

  1. Apr 6, 2005 #1
    The vapor pressure of HN3 is 58 Torr at -22.75 C and 512 Torr at 25C. Find the standard enthalpy of vaporization, standard entropy of vaporization, the standard free energy of vaporization.

    I know how to find the first two, but for some reason I can't find the third one...Is the equation for it lnP=-G/(RT). If so, what unit is P in and which P should I use and is R 8.3145 and what temperature do I use?
  2. jcsd
  3. Apr 7, 2005 #2
    did you try G=H-TS?
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