Enthalpy of Solution & Hydration (AQA A-Level Chemistry): Flashcards

Enthalpy change when 1 mol ionic solid dissolves in water (infinitely dilute)

Breaks down; ions surrounded by solvent molecules

$\Delta H_{sol} = \Delta H_{lattice} + \Delta H_{hydration}$

Energy to separate 1 mol ionic compound into gaseous ions

Endothermic

Enthalpy change when 1 mol gaseous ions dissolve in water to form hydrated ions

Exothermic (energy released when water bonds with ions)

Water is polar with partial charges on H and O atoms

Negative end (oxygen)

Positive end (hydrogen)