The lattice energy of KBr is 671 kJ mol⁻¹, and the combined hydration enthalpy of K⁺(aq) and Br⁻(aq) is −715 kJ mol⁻¹. Calculate the enthalpy change of solution, ΔHₛₒₗₙ, for KBr (in kJ mol⁻¹) and state whether the dissolution is exothermic or endothermic.