Question

LiCl and CaO have similar bond lengths of 230 pm and 238 pm, respectively. The lattice energy of LiCl is –852 kJ/mol. Select the approximate expected lattice energy of CaO. Group of answer choices

a-: –426 kJ/mol

b.. –3410 kJ/mol

c. –1700 kJ/mol

d.. –852 kJ/mol

e.. –213 kJ/mol

Answer 1

Answer--- option B) -3410 KJ/mol

The lattice energy of a crystalline solid is a measure of the energy released when ions are combined to make a compound. It is a measure of the cohesive forces that bind ions.

Factors :-

1) the charge of the ions increases, the lattice energy increases.

2) the size of the ions increases, the lattice energy decreases.

There is not any such general trend in Bond length and lattice energy.

Also CaO which have NaCl type structure do have

Experimental Lattice Energy	−3414 kJ/mol