Chemistry

Problem

The dissolution of an ionic compound in water at 298 K has

\Delta H^{\circ}_{\text{diss}} = +21\,\text{kJ mol}^{-1}

and

\Delta S^{\circ}_{\text{diss}} = +120\,\text{J mol}^{-1}\,\text{K}^{-1}

. Calculate

\Delta G^{\circ}_{\text{diss}}

at 298 K and state whether the dissolution is spontaneous under standard conditions.