Based on the phase diagram shown below, which of the following statements are correct?
I. Sublimation occurs at a point in the transformation that falls along a straight line from point A to point F.
II. C and E represent points where the gas and liquid phases are in equilibrium.
III. ΔH_vap can be measured at point B.
IV. Molecules at point D have a greater average kinetic energy than those at point F.
V. The temperature at point E is called the critical temperature of the compound.

Question

Quizplus · Accepted Answer

I. Sublimation occurs when a substance goes directly from the solid phase to the gas phase without passing through the liquid phase. This can be seen along the straight line between point A and point F. II. Points C and E represent the vapor and liquid phases in equilibrium. III. ΔH_vap represents the enthalpy of vaporization, which can be measured at point B. IV. According to the phase diagram, molecules at point D have a greater average kinetic energy than those at point F as they are at a higher temperature. V. The temperature at point E is called the critical temperature, which is the highest temperature at which a substance can exist as a liquid.

Based on the Phase Diagram Shown Below, Which of the Following