22.2 Enthalpy changes in solution

Question 1

explain ionic compounds dissolving

Answer 1

water molecules are able to break up the giant ionic lattice structure and overcome the strong electrostatic attractions between oppositely charged ions
the overall energy change associated with the dissolving process is the enthalpy change of solution

Question 2

standard enthalpy change of solution, ΔsolH⦵

Answer 2

is the ΔH that takes place when one mole of a solute dissolves in a solvent

if the solvent is water, the ions from the ionic lattice finish up surrounded with water molecules as aqueous ions

Question 3

is enthalpy change of solution exothermic or endothermic

Answer 3

it can be both