Boiling Point of Molecules- How strong molecules are interacting with each other

- The larger the dipole moment, the stronger the interaction

+ -

+ -

+ -

+-

+

-

+ -

Boiling Point of Alkanes

Induced dipole-induced dipole interactionAKA

van der Waals force (interaction)

+

-

+

-

-

+

Boiling Point of Molecules- Hydrogen bond

- Polarized covalent bond

OH H

- Other example of H-bond: NH, SH,

O

HH

O

O

O

H H

H

H

H

H

Melting Point of Molecules- How well molecules are “packed”

- The better the packing, the higher the melting point

Solubility of Molecules- How well molecules interact with solvents

- solvation

O

HH O

HH

O

HH

+

-

O

H

H O

H

H

O

HH

+

-

OH

H CH

Halkane

methanol