Higher boiling points : a. Molecules with stronger intermolecular forces tend to have higher boiling points.
b. Considering isomers of molecules with the same formula but different shapes, those with a more spherical shape tend to have higher boiling points.
c. Comparing molecules of similar molar mass, molecules with hydrogen bonding tend to have lower boiling points than those with only dipole-dipole forces.
d. Considering molecules with the same types of intermolecular forces, those with higher molar mass tend to have higher boiling points.