Question

lattice energy depends on​

Answer 1

Answer:

charge and intermolecular distance

Explanation:

directly proportional to product of charge

inversely prop to distance

Answer 2

Answer:

1). the charge on the ions, and the radius, or size, of the ions.

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

Explanation :-

In 1918, Born and Lande presented the following model for lattice energy:

[latex]E = - \frac {N_AMz^+z^-e^2}{4 \pi \epsilon_o r_o} (1-\frac {1}{n})[/latex]

In this equation, NA is Avogadro’s constant; M is the Madelung constant, which depends on the crystal geometry; z+ is the charge number of the cation; z– is the charge number of the anion; e is the elementary charge of the electron; n is the Born exponent, a characteristic of the compressibility of the solid; [latex]\epsilon _o[/latex] is the permittivity of free space; and r0 is the distance to the closest ion.

This model emphasizes two main factors that contribute to the lattice energy of an ionic solid: the charge on the ions, and the radius, or size, of the ions. The effect of those factors is:

as the charge of the ions increases, the lattice energy increases

as the size of the ions increases, the lattice energy decreases

Lattice energies are also important in predicting the solubility of ionic solids in H2O. Ionic compounds with smaller lattice energies tend to be more soluble in H2O.

Lattice Energies – Chemistry TutorialThis tutorial covers lattice energy and how to compare the relative lattice energies of different ionic compounds.