Thermodynamic quantities for the dissolution of three ionic compounds at 298 K are provided.
Compound Lattice enthalpy (kJ mol⁻¹) Hydration enthalpy (kJ mol⁻¹) ΔS° (J mol⁻¹ K⁻¹)
M +760 −780 +155
N +920 −850 +90
O +680 −640 +70
Which compound is expected to be the least soluble in water under standard conditions?
a) Compound O
b) Compound N
c) Compound M
d) All three compounds should have comparable solubilities