How is hydration energy related to enthalpy of crystallization?
In the discussion of lattice energy, we consider the ions separated into a gas form whereas in the disolution process, the ions are also separated, but this time into ions dispersed in a medium with solvent molecules between ions. The medium or solvent has a dielectric constant. The molar enthalpy of solvation, Hsolv, is the energy released when one mole solid is dissolved in a solvent. This quantity, the enthalpy of crystallization, and energy of hydration forms a cycle.
