1. Intermolecular Forces
Liquids & Solids
Intermolecular Forces

2. Definition of IMF Much weaker than chemical bonds within molecules.
Attractive forces between molecules.
Much weaker than chemical bonds within molecules.
a.k.a. van der Waals forces

3. Types of IMF

4. Types of IMF
London Dispersion Forces
View animation online.

5. Types of IMF
Dipole-Dipole Forces + -
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6. Types of IMF
Hydrogen Bonding

7. Determining IMF NCl3 CH4 HF polar = dispersion, dipole-dipole
nonpolar = dispersion HF
H-F bond = dispersion, dipole-dipole, hydrogen bonding