Ranking intermolecular forces

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dannys00

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  1. Pre-Dental
How do you rank intermolecular forces in terms of energy needed to break their bonds? (Also taking into account intramolecular forces.)
So for I know Intramolecular forces > Intermolecular forces.
And that intra consist of ionic and covalent bonds. Inter consist of H bonds, Dipole-Dipole, and London Dispersion.
So would the ranking go:
1) Network Covalent
2) Ionic
3) H bonding
4) Dipole Dipole
5) London

This is what I learned from Chads videos, but everywhere on google I was seeing: Ion dipole > H bonding > dipole dipole
Can someone please clarify these for me, I am extremely lost.
Thank you in advance.
 
First of all, Ionic and network covalent bonding are INTRAMOLECULAR.......and they would be far stronger than any intermolecular attractions......As a general rule....put network covalent first....Ionic second. Exceptions abound, but this is a nice approximation. For intermolecular attractions.....use the rule I teach all my students and most PhD authors agree upon......Ion-dipole>Hydrogen Bonding >Dipole -Dipole > London Dispersion...

Hope this helps

Dr. Jim Romano
 
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