This graph shows how the vapor pressure of three liquids varies with temperature

Question

This graph shows how the vapor pressure of three liquids varies with temperature 400 acetone hexane -benzene 50 60 70 80 90 temperature, c Use the graph to answer the following questions most volatile | choose one Which liquid is the most volatile? Which is the least volatile? least volatile: I choose one What is the normal boiling point of each liquid? Note: your answer must be within 1°C of the exact answer to be graded correct. hexane Suppose a beaker of hexane is put inside a sealed tank containing hexane gas at 61. degree C and 397. torr After ten minutes, will there be more liquid in the beaker, less liquid, or the same amount? more less the same

Explanation / Answer

Most volatile liquid is Acetone

Least volatile liquid is Benzene

Normal boiling point is temperature when external pressure is 760 Torr.

Normal boiling point of Acetone is 56 oC

Normal boiling point of Hexane is 69 oC

Normal boiling point of Benzene is 80  oC

Same amount of Hexane in beaker because vapour pressure doesn't depend on amount of liquid.

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