I'm learning about the process of dissociation. I'm aware in dissolution that essentially three processes occur (I know I may be simplifying it, but I am in Year 11):
- Solute particles break apart (endothermic)
- Solvent particles break apart (endothermic)
- Solvent and solute particles bond/solvate (exothermic)
This much makes sense to me. However, when I get to dissociation my textbook only presented with two processes:
- Lattice energy - energy required to break apart ionic lattice (endothermic)
- Hydration energy - energy released by water molecules hydrating ions (exothermic)
What is confusing me is that the energy for the bonds (hydrogen bonds) between the water molecules to be broken apart doesn't seem to be accounted for?