Answer to Question #135099 in General Chemistry for Kean

Question

At a room temperature, the vapour pressure of acetone is 0.28 atm, ethanol is 0.08 atm, pentane is 0.71 atm, water is 0.03 atm. How will you arrange the substance in order of increasing boiling point temperature?

Answer 1

The vapor pressure of a liquid lowers the amount of pressure exerted on the liquid by the atmosphere . As a result, liquids with high vapor pressures have lower boiling points.

hence the order of boiling points will be

pentane<acetone<ethanol<water