which one of the following alkaline earthmetal sulphates has its hydration enthalpy greater than its lattice enthalpy?

a)CaSO4

b)BeSO4

c)BaSO4

d)SrSo4

and what is the method

BeSO4 have high hydration enthalpy than lattice enthalpy.. Lattice enthalpy is inversely proportional to size of cation and anion.... Here anion is sulphate ion.. Which is larger in size so lattice enthalpy will be less... And hydration enthalpy is inversely proportional to only size of cation so BeSO4 should be the answer.. Hope U like it