Rank the following compounds in order of increasing strength of intermolecular forces, putting the molecule with the weakest intermolecular force first.

Question

Quizplus · Accepted Answer

The intermolecular forces (IMF) in a molecule are based on the types of interactions present which are hydrogen bonding, dipole-dipole interactions, and Van der Waals forces. Among the given compounds:
I) Methane (CH4) has only weak Van der Waals forces and no other type of interaction is present.
II) Acetone (CH3COCH3) has dipole-dipole interactions and Van der Waals forces. Since dipole-dipole is stronger than Van der Waals force, it has stronger intermolecular forces.
III) Ethanol (CH3CH2OH) has the strongest intermolecular forces due to hydrogen bonding in addition to dipole-dipole and Van der Waals forces. Hydrogen bonding is stronger than dipole-dipole or Van der Waals force.

Rank the Following Compounds in Order of Increasing Strength of Intermolecular