Question

Which statement is true about crystal lattice energy?

It increases as the size of the ions increases.
It increases as the charge on the ions decreases.
It is the energy that ions absorb when they form a crystal.
It is a measure of the strength of the bonds between ions.

Answer 1

Answer: The correct option is:

It is a measure of the strength of the bonds between ions.

Step-by-step explanation:

Lattice energy is defined as amount of energy released on the formation of one mole of crystalline solid from gaseous ions.It is also defined as energy required to break the 1 mole of crystalline solid into its constituting ions in gaseous state that is strength between the ions.

It depends upon two factors:

• With increase in charge on the ion the lattice energy increases.
• With increase in the size of the ions the lattice energy decreases.

So, from the given options the correct statement is:

It is a measure of the strength of the bonds between ions.

Answer 2

The answer is:

It is a measure of the strength of the bonds between ions.

Lattice energy is an estimate of the strength of the bonds formed by ionic compounds.

The first two choices are wrong because it is actually the opposite.

• As the ion size increases, lattice energy decreases.

• As charge of ions increases, lattice energy increases

As for the other third option, it is wrong because lattice energy is the energy RELEASED not absorbed.