- A new compound has been synthesized - your task, should you choose to accept it, is to explore its phase diagram. Close to the compound's triple point we find that the vapor pressure over the liquid phase (Pi) and solid phase (ps) can be expressed as: In ps 4000 K +18 T In pi 3000 K + 12 T (2) (a) What is the temperature and pressure at the triple point? (b) What is the phase of the compound at 293 K, 1 bar? (c) What is the heat of vaporization for the compound, AHvap