Intermolecular Forces

## Forces Between Molecules Intermolecular forces (IMFs) are weak attractions between molecules that affect physical properties like boiling and melting points, solubility, and evaporation. ### Types of Intermolecular Forces - **London Dispersion Forces:** Weakest; present in all molecules. - **Dipole-Dipole Interactions:** Between polar molecules. - **Hydrogen Bonding:** Strong type of dipole interaction, occurs when H is bonded to N, O, or F. ## Impact on Properties Stronger IMFs mean higher boiling/melting points. Water's high boiling point is due to hydrogen bonding! ## Everyday Connections - Water beads up on a car because of hydrogen bonding. - Butter is solid at room temperature due to weak London forces between its molecules.