1) The critical temperature of compound X is approximately 750°C.
2) At room temperature (around 20-25°C) and atmospheric pressure (around 1 atm), compound X would most likely be in the solid phase.
3) All three phases coexist at the triple point, which is approximately 400°C and 50 atm.
4) At 45 atm and 100°C, compound X is in the solid phase. Raising the temperature to 400°C at constant pressure (45 atm) will cause it to melt into the liquid phase.
5) Compound X cannot be boiled at 200°C because, at that temperature, the substance sublimes directly from solid to gas at pressures below approximately 30 atm; there is no liquid phase stable at 200°C under any pressure shown on the diagram.
6) No, you could not drink compound X because it is a solid at room temperature and pressure, and its phase behavior suggests it is not a consumable substance under normal conditions.
Parent Tip: Review the logic above to help your child master the concept of phase diagrams worksheet.
