Question

why the boiling point of ethyl bromide is higher than that of ethyl chloride?

Answer 1

Dear Student,

Boiling point of haloalkanes depends upon the size and vander wall forces between the molecules of haloalkane. When the molecules of haloalkane have same alkyl group and different halogen atom then boiling point of the haloalkane depends upon the size of halogen atom.

Order of boiling point : RCl<RBr < RI

Reason : With the increase in the size and mass of halogen atom vander wall forces of attraction increases due to which boiling point increases.

So, boiling point of ethyl bromide is higher than ethyl chloride.

Regards