At the dissolution of a molecular solid has and

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

298\,\text{K}

the dissolution of a molecular solid has

\Delta H^{\circ}=+5.6\,\text{kJ mol}^{-1}

and

\Delta G^{\circ}=-1.2\,\text{kJ mol}^{-1}

. What is the corresponding standard entropy change,

\Delta S^{\circ}

, for the dissolution? (a)

-23\,\text{J mol}^{-1}\,\text{K}^{-1}

(b)

+19\,\text{J mol}^{-1}\,\text{K}^{-1}

(c)

+23\,\text{J mol}^{-1}\,\text{K}^{-1}

(d)

-4\,\text{J mol}^{-1}\,\text{K}^{-1}