Question

Rank these compounds in order of lowest boiling point to highest boiling point and explain your reasoning:

a) Ethoxyethane

b) Pentane

c) 1-Butanol

d) 2-methylpropanal

Answer 1

order of lowest boiling point to highest boiling point: Ethoxyethane < pentane < 2-methylpropanal < 1-Butanol

Highest boiling point: 1-butanol

lowest boiling point: Ethoxyethane

Explanation: 1-butanol has highest boiling point due to the presence of strong hydrogen bonding. hydrogen bonding is a strong intermolecular forces of attraction which requires high energy to break.

penatne is a hydrocarbon which has only weak vanderwaal's forces of attraction and has lowest boiling point than aldehyde.

ethoxy ethane has lowest boiling point due to the lowest molar mass.