Question

Compare the boiling points of alcohol, ethers and alkanes and explain one reason for the difference

Answer 1

Alcohols have higher boiling points than do ethers and alkanes of similar molar masses.

What is meant by Boiling Point ?

The temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid is called the boiling point of the substance.

Approximately boiling point of Ethanol: 78.4°C, ether: 34.6°C, ethanes: 68°C

The reason for the difference is that it takes more energy to separate alcohol molecules then it does to separate alkane molecules and ether molecules.

The OH group in  alcohol allows molecules to engage in hydrogen bonding.

Therefore Boiling point are in the order ;

Alcohol > alkane > ethers

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