5.2.1 Lattice Enthalpy

Question 1

explain and use the term lattice enthalpy (H

negative, ie gaseous ions to the solid lattice)

as a measure of ionic bond strength;

Question 2

use the lattice enthalpy of a simple ionic solid

(ie NaCl, MgCl2) and relevant energy terms

to:

(i) construct Born–Haber cycles,
(ii) carry out related calculations;

Question 3

explain and use the terms enthalpy change of

solution and enthalpy change of hydration

Question 4

use the enthalpy change of solution of a simple ionic solid (ie NaCl, MgCl2) and

relevant energy terms (enthalpy change of

hydration, and lattice enthalpy), to:

(i) construct Born–Haber cycles,
(ii) carry out related calculations;

Question 5

explain, in qualitative terms, the effect of ionic charge and ionic radius on the exothermic value of a lattice enthalpy and enthalpy change of hydration.