$\Delta G=\Delta H-T \Delta S$
when $\Delta G=0, \Delta H=T \Delta S$
$\Delta H=40.63 \mathrm{kJ} \mathrm{mol}^{-1}$$=40.63 \times 10^{3} \mathrm{J} \mathrm{mol}^{-1}$
$\Delta S=108.8 \mathrm{JK}^{-1} \mathrm{mol}^{-1}$
$\therefore \quad T=\frac{\Delta H}{\Delta S}$$=\frac{40.63 \times 10^{3}}{108.8}=373.43 \mathrm{K}$