Question

Which of the following is the correct order for the lattice energy?
(1) LiF > NaCl > KCI > KI
(2) LiF > NaCl > KI > KCI
(3) NaCl > KCI > LiF > KI
(4) NaCl > KCI > KI > LiF​

Answer 1

LiF > NaCl > KCl > KI

Explanation:

The correct order of lattice energy of these compounds is:

    LiF > NaCl > KCl > K

• Lattice energy is inversely proportional to the radius of cation or anion.

• In this series,K has the largest radii and hence would have lowest lattice energy and Li has radius smaller in size, it would have the largest Lattice energy.

The lattice energy of LiF = 1017 kJ/mole

The lattice energy of NaCl = 788 kJ/mole

The lattice energy of KCL = 771 kJ/mole

The lattice energy of KI = 649 kJ/mole

Answer 2

Answer:

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