Standard entropies of X₂, Y₂ and XY₅ are 70 J K⁻¹ mol⁻¹, 50 J K⁻¹ mol⁻¹, and 110 J K⁻¹ mol⁻¹ respectively. The…

Question

Standard entropies of $$X_2$$, $$Y_2$$ and $$XY_5$$ are **$$70 \, 	ext{J} \, 	ext{K}^{-1} \, 	ext{mol}^{-1}$$**, **$$50 \, 	ext{J} \, 	ext{K}^{-1} \, 	ext{mol}^{-1}$$**, and **$$110 \, 	ext{J} \, 	ext{K}^{-1} \, 	ext{mol}^{-1}$$** respectively. The temperature in Kelvin at which the reaction
$$ \frac{1}{2} X_2 + \frac{5}{2} Y_2 ightarrow XY_5 \quad \Delta H = -35 \, 	ext{kJ mol}^{-1} $$
will be at equilibrium is (nearest integer):

Accepted Answer

700

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