For isomeric alkanes , more the branching , lower is the boiling point . Why ? Share with your friends Share 0 Vartika Jain answered this Dear Student, In isomeric alkanes, the branched chain isomers have low boiling points as compared to their corresponding straight chain isomers. Greater the branching of the chain is, lower is the boiling point. This is because branching of the chain makes the molecule more compact and brings it closer to the sphere. This decreases the surafce area and hence, the magnitude of interparticle van der waals forces and leads to decrease in boiling point. For eg. n-pentane has higher boiling point than isopentane. 1 View Full Answer
