The strongest intermolecular force is ion-dipole between an Ion and a polar covalent compound. This is followed by hydrogen bond, and then dipole-dipole forces for polar covalent compounds.

hydrogen bonds

If you meant to ask about intermolecular forces, the answer is the same in that the intermolecular forces in H2O are much stronger than those in N2. In H2O, the intermolecular forces are not only hydrogen bonging, but you also have dipole-dipole and dispersion forces. In N2, you have only dispersion forces.

to be weaker than dipole-dipole interactions, unless the dipoles are very small. H- bonding tends to be the strongest force, if present. Chlorine is more electronegative than bromine so the dipole moment in CH2Cl2 is larger than that in CH2Br2 leading to stronger dipole-dipole forces.

Dipole forces are the dominant intermolecular forces of attraction between CHCl3 molecules while the dominant intermolecular forces of attraction within CCl4 molecules are London forces. So CCl4 will have the lower boiling point as less energy is needed to overcome the London forces between them.

polar C-O bonds

Acetone molecules are attracted by both dipole-dipole interactions and London forces. The strength of the H-bonds among water molecules still predominates in determining the higher boiling point of water compared to acetone.

The hydrogen-bonded complex of acetone with one water molecule is calculated as shown in Fig. 1(b). In the complex, the hydrogen bond is formed between H atom of water molecule and O atom of the acetone molecule, the hydrogen bond length is 1.9396 Å (1 Å = 0.1 nm).

While it’s true that acetone, (CH3)2C=O. can hydrogen-bond with water, it can only form dipole-dipole interactions with itself. Acetic acid, CH3COOH , can hydrogen-bond with itself (very well, I might add!). since acetone has dipole-dipole interactions with ITSELF, it has the second-highest boiling point.

1 Expert Answer. The oxygen in acetone is partially negative and the H atom in water is partially positive. They will be attracted to form a hydrogen bond.