For the dissolution of in water

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

Problem

For the dissolution of

\mathrm{NH_4Cl(s)}

in water, the enthalpy and entropy changes are

\Delta H^{\circ}=+15.2\,\text{kJ\,mol}^{-1}

and

\Delta S^{\circ}=+110\,\text{J\,mol}^{-1}\,\text{K}^{-1}

, respectively. What is

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

298\,\text{K}

? (a)

+48.6\,\text{kJ\,mol}^{-1}

(b)

-32.8\,\text{kJ\,mol}^{-1}

(c)

-17.6\,\text{kJ\,mol}^{-1}

(d)

+17.6\,\text{kJ\,mol}^{-1}