試題詳解

62. Solid KF has a lattice energy of –804 kJ/mol and a heat of solution (in water) of –15 kJ/mol. RbF has a lattice energy of –768 kJ/mol and a heat of solution (in water) of –24 kJ/mol. Which salt forms stronger attractions with water?
(A) KF, because it releases more heat during the formation of crystal.
(B) KF, because it has a more negative heat of hydration.
(C) RbF, because it releases more heat during the formation of crystal.
(D) RbF, because it has a more negative heat of hydration.
(E) Both salts have the same interactions with water.