According to the Phase Diagram Given, Which of the Following

question 29

Multiple Choice

According to the phase diagram given, which of the following is INCORRECT?

• A) At the temperature and pressure of point 1, substance U exists as a three-phase equilibrium system.
• B) At the temperature and pressure of point 2, substance U exists as a one-phase gaseous system.
• C) At the temperature and pressure of point 3, substance U exists as a two-phase system.
• D) If the U(s)⇔ U(l) system is maintained at the temperature of point 4 while pressure is decreased steadily to about 300 torr, more U will freeze.
• E) There are no conditions of temperature and pressure under which solid U will vaporize without melting first.