A sample of methanol, CH3OH, is introduced into an evacuated chamber with a movable piston. The pres — Gases Chemistry Question
Question
A sample of methanol, CH3OH, is introduced into an evacuated chamber with a movable piston. The pressure is measured as a function of the volume of the container while the temperature is maintained at 50 °C, and the graph below is obtained. Which statement best describes this system?
A.
At volumes below 60 mL, methanol is only present in the liquid phase.
B.✓ Correct
At volumes above 60 mL, methanol is only present in the gaseous phase.
C.
If the process were repeated at 60 °C, the point at which the pressure begins to decrease would shift to higher volume.
D.
If more methanol were added to the container, the pressure at V = 20 mL would increase.
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