Standard entropies of X_2, Y_2 and XY_3 are 60, 40 and 50 J K^-1 mol^-1 respectively. For the reaction 1/2 X_2+3/2 Y_2 ⇌ XY_3, Δ H =-30 kJ to be at…

Standard entropies of $\displaystyle \mathrm{X}_2, \mathrm{Y}_2$ and $\displaystyle \mathrm{XY}_3$ are $\displaystyle 60$, $\displaystyle 40$ and $\displaystyle 50 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$ respectively. For the reaction $\displaystyle \frac{1}{2} \mathrm{X}_2+\frac{3}{2} \mathrm{Y}_2 \rightleftharpoons \mathrm{XY}_3, \Delta \mathrm{H}=-30 \mathrm{~kJ}$ to be at equilibrium, the temperature should be :