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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

According to the Phase Diagram Given,which of the Following Is