Which of the following statements concerning lattice energy is false?
A)MgO has a larger lattice energy than NaF.
B)The lattice energy for a solid with 2+ and 2- ions should be two times that for a solid with 1+ and 1- ions.
C)MgO has a larger lattice energy than LiF.
D)Lattice energy is often defined as the change in energy that occurs when an ionic solid is separated into isolated ions in the gas phase.
E)All of these are true.

Question

Quizplus · Accepted Answer

The statement "The lattice energy for a solid with 2+ and 2- ions should be two times that for a solid with 1+ and 1- ions" is false. Lattice energy depends on the charge of the ions and the distance between them, but it is not directly proportional to the charge. Therefore, an increase in charge does not necessarily result in a proportionate increase in lattice energy.

Which of the Following Statements Concerning Lattice Energy Is False