Question

Rank the following compounds in order of increasing boiling point and state which types of intermolecular forsee are present in each molecular

CH3-CH2-OH CH3-CH2-CH3 Ch3-O-CH3

Answer 1

Compounds that have stronger intermolecular forces have higher boiling point.

The boiling point increases:

CH₃-CH₂-CH₃ < CH₃-O-CH₃ < CH₃-CH₂-OH.

Intermolecular forces:

CH₃-CH₂-CH₃: dispersion forces ;

CH₃-O-CH₃: dispersion and dipole-dipole forces;

CH₃-CH₂-OH: dispersion, dipole-dipole and hydrogen forces.