Consider a saturated solution, (i.e., a solution in equilibrium with solid solute) of sodium chloride. If the temperature is raised, then for
$\mathrm{NaCl}\left(\mathrm{s}\right)+\mathrm{aq}\rightleftharpoons \mathrm{NaCl}\left(\mathrm{aq}\right);\mathrm{\Delta H}=+ \mathrm{ve}:$