Question #50327
1 Answer
Boiling point is all about intermolecular forces, or, more precisely, about the strength of intermolecular forces.
The relationship between boiling point and intermolecular forces can be described like this: compounds that exhibit stronger intermolecular forces will have higher boiling points.
Start with
This means that isopropyl alcohol molecules can form hydrogen bonds with each other. Hydrogen bonds are the strongest type of intermolecular bonds, which implies that this compound will have a relatively high boiling point.
Finally,
This implies that the molecule will exhibit dipole-dipole interactions - the more electronegative oxygen will have a partial negative charge, will will induce a permanent dipole moment in the molecule.
As a conclusion, the three compounds are ranked in order of increasing boiling point like this