1. Boiling Point of Molecules
- How strong molecules are interacting with each other
- The larger the dipole moment, the stronger the interaction +d -d +d -d +d -d +d -d +d -d +d -d

2. Boiling Point of Alkanes
Induced dipole-induced dipole interaction
AKA
van der Waals force (interaction) +d -d +d +d -d -d

3. Boiling Point of Molecules
- Hydrogen bond
- Polarized covalent bond H H O H O H H O H H O O H H H
- Other example of H-bond: NH, SH,

4. Melting Point of Molecules
- How well molecules are “packed”
- The better the packing, the higher the melting point

5. Solubility of Molecules
- How well molecules interact with solvents
- solvation O H O H
methanol H H C O +d +d
alkane H H H -d -d O H O O H H O H H