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. (\(\Delta\H_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. This statement is incorrect because sublimation occurs at a point where the vapor pressure curve crosses the solid-liquid boundary line. 
II. This statement is correct because points C and E represent the conditions at which the gas and liquid phases are in equilibrium. 
III. This statement is incorrect because the enthalpy of vaporization can only be measured experimentally and cannot be determined from the phase diagram alone. 
IV. This statement is correct because point D is at a higher temperature than point F, meaning that the molecules at point D have a greater average kinetic energy. 
V. This statement is also incorrect because the temperature at point E is actually the critical point temperature, not the critical temperature itself. The critical temperature is the temperature above which the substance cannot exist in the liquid state, regardless of the pressure.

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