A hypothetical solution forms between a solid and a liquid. The values of the thermodynamic quantities involved in the process are shown.
Action Enthalpy
separation of solute 11.5 kJ/mol
separation of solvent 23.8 kJ/mol
formation of solute-solvent interactions -86.7 kJ/mol solute
the enthalpy of solution in kilojoules per mole of solute?