Final answer:
Among the options given, CH3OH exhibits hydrogen bonding, which is stronger than the intermolecular forces present in the other compounds. It specifically has an -OH group that can form hydrogen bonds.
Step-by-step explanation:
The compound that exhibits hydrogen bonding as its strongest intermolecular force among the given options (C3H8, CF4, CH2F2, LiI, CH3OH) is CH3OH (methanol). Hydrogen bonding occurs when a hydrogen atom is bonded to a strongly electronegative atom like nitrogen, oxygen, or fluorine and is in close proximity to another electronegative atom. CH3OH has an -OH group capable of forming hydrogen bonds, providing it with a uniquely strong dipole-dipole attraction known as hydrogen bonding. This type of intermolecular force is much stronger than London dispersion forces present in nonpolar molecules like C3H8 and CF4 or the dipole-dipole interactions in polar molecules like CH2F2. Additionally, LiI is an ionic compound and its primary intermolecular interaction is ionic bonding rather than hydrogen bonding.