Answer to Question #304381 in General Chemistry for zhong

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 intermolecular forces of attraction.

B. arrange these substances in order of increasing boiling point temperature.

Answer 1

(a) Order of increasing intermolecular forces of attraction

Acetone(lowest), ethanol, water and acetic acid(highest).

Lower values of vapour pressure correspond to higher boiling points implying stronger intermolecular forces of attraction.

(b) Order of increasing boiling points

Acetone(lowest), ethanol, water and acetic acid(highest).

Higher values of vapour pressure correspond to lower boiling points.