Intermolecular Intra Molecular Forces

1.

C₆H_6(l) + energy → C₆H_6(g), you can say that the reaction affected intermolecular forces because the single molecules don't change. The broken bonds were between molecules of benzene.

2.

NaCl_(l) + energy → Na⁺_(aq) + Cl^-_(aq) Sodium chloride is technically not a molecule, but you can see that the strong ionic bonds intra-NaCl are broken.

3.

This is a combustion reaction, in which the products are totally different. Both the inter- and intra- molecular bonds are affected.