Melting and Boiling point

[Alex_Lee_1K]

Hello,

When looking for which species has a higher boiling point, what would be good inidcators?
ex. shorter bonds means higher boiling point

Thanks

[905749989]

The difference in strength of Intermolecular forces. For example if one compound can form hydrogen bonds with itself and the other compound in comparison can only form dipole-dipole bonds, the hydrogen bonded compound will have a higher melting/boiling point.

[Charmaine Ho 2G]

Hydrogen bonding, polarity, short bonds, larger molecular size and a rod shape all contribute to a higher boiling/melting point.

[Daniel Tabibian 3K]

The species with stronger intermolecular forces will have a higher boiling point since it is harder to break apart. The intermolecular forces in order of strength are ion-ion, hydrogen bonding, ion-dipole, dipole-dipole, dipole-induced dipole, and london dispersion. If both species have the same forces (both polar, both nonpolar) then the species with longer bonds or a more linear structure will have a higher boiling point due to greater london dispersion which is present in every molecule.

[405532435]

When molecules have a high boiling and melting point, they are usually short bonds with large size, and mostly happens through hydrogen bonding.