Chemistry

Problem

The dissolution of salt R has

\Delta H^\circ = +25\,\text{kJ}\cdot\text{mol}^{-1}

and

\Delta S^\circ = +85\,\text{J}\cdot\text{mol}^{-1}\cdot\text{K}^{-1}

. Determine the temperature, in °C, above which the dissolution becomes spontaneous under standard conditions.