Thermodynamics

For \(\mathrm{NaCl}_{(\mathrm{s})}\) enthalpy of solution is \(4 \mathrm{~kJ} \mathrm{~mol}^{-1}\) and lattice enthalpy is \(790 \mathrm{~kJ} \mathrm{~mol}^{-1}\). What is hydration enthalpy of \(\mathrm{NaCl}\) ?