本题目来源于试卷: Models of Bonding & Structure B.1 The Ionic Model，类别为 IB化学
[单选题]
Which statements are correct about lattice enthalpies?
I.Salts with smaller lattice enthalpies have higher melting points
II.The lattice enthalpy depends on the charge of the constituent ions
III.The lattice enthalpy depends on the size of the constituent ions
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
参考答案: C
本题详细解析:
The higher the charge of the ions, the stronger the electrostatic forces of attraction and, therefore, the greater the lattice enthalpy.
The smaller the ion, the greater the charge density and the stronger the electrostatic attraction between oppositely charged ions.
Statement I is incorrect since the smaller the lattice enthalpy, the weaker the electrostatic attraction and the lower the melting point is.
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