Chemistry - Thermochemistry Question with Solution | TestHub

For non spontaneous reaction $\Delta \mathrm{G}=+\mathrm{ve}$ $\Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T}\Delta \mathrm{S}$ and $\Delta \mathrm{S}=121\mathrm{J}{\mathrm{K}}^{-1}$ For $\Delta \mathrm{G}=+\mathrm{ve}$ $\Delta \mathrm{H}$ has to be positive. Hence the reaction is endothermic. The minimum value of $\Delta \mathrm{H}$ can be obtained by putting $\Delta \mathrm{G}=0$ $\begin{array}{rl}\Delta \mathrm{H}& =\mathrm{T}\Delta \mathrm{S}=298\times 121\mathrm{J}\\ & =36.06\mathrm{kJ}\end{array}$