When each of the following salts dissolves in water at

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

25^\circ\text{C}

, the enthalpy change per mole of solute is measured: NaOH:

\Delta H = -44.5\,\text{kJ mol}^{-1}

NH₄NO₃:

\Delta H = +25.7\,\text{kJ mol}^{-1}

KCl:

\Delta H = +17.2\,\text{kJ mol}^{-1}

List the salts in order from most endothermic dissolution to most exothermic.