Answer to Question #134735 in General Chemistry for bj

Question

At 50.° C the vapor pressure of ethanol is 0.30 atm,acetic acid is 0.08 atm,water is 0.12 atm,and acetone is 0.84 atm.
A.Arrange these substances in order of increasing rates of evaporation.
B.Arrange these substances in order of increasing boiling point temperature.

Answer 1

a) The greater the value of vapor pressure, the higher the evaporation rate. Therefore, the order will be:

Acetic acid (lowest) < water < ethanol < acetone

b) The higher vapor pressure corresponds to the lower boiling point. Hence the order is:

Acetone (lowest) < ethanol < water < acetic acid