Final answer:
An ionic compound with a δhsol value of 250 kJ mol-1 is likely to be soluble due to it being an endothermic process. A positive δhsol value suggests that the compound will dissolve in water to an appreciable extent.
Step-by-step explanation:
An ionic compound with an enthalpy of solution (δhsol) value of 250 kJ mol-1 is likely to be soluble. The enthalpy of solution measures the amount of heat absorbed or released when a solute dissolves in a solvent. If the enthalpy of solution is positive, it indicates an endothermic process and suggests that the compound will dissolve in water to an appreciable extent. Therefore, a positive δhsol value of 250 kJ mol-1 suggests that the ionic compound is likely to be soluble.