The factor of values are important in metallurgy. The ∆G values for the following reactions at 800°C are given as S2(s)+2O2(g)→2SO2(g),ΔG=−544kj2Zn(s)+S2(s)→2ZnS(s),ΔG=−293kj2Zn(s)+O2(g)→2ZnO(s),ΔG=−480kjThe ∆G for the reaction, 2ZnS(s)+3O2(g)→2ZnO(s)+2SO2(g)will be

∆G of formation of different substance are as 2SO2 = -544 kJ 2Zns = -293 kJ 2ZnO = -480 kJFor the reaction,2ZnS+3O2(g)→2ZnO(s)+2SO2(g)ΔG=ΔG(products )−ΔG(reactan ts )=[(−480)+(−544)−(−293)]=−1024+293=−731kJ

The factor of values are important in metallurgy. The ∆G values for the following reactions at 800°C are given as S2(s)+2O2(g)→2SO2(g),ΔG=−544kj2Zn(s)+S2(s)→2ZnS(s),ΔG=−293kj2Zn(s)+O2(g)→2ZnO(s),ΔG=−480kjThe ∆G for the reaction, 2ZnS(s)+3O2(g)→2ZnO(s)+2SO2(g)will be

∆G of formation of different substance are as 2SO2 = -544 kJ 2Zns = -293 kJ 2ZnO = -480 kJFor the reaction,2ZnS+3O2(g)→2ZnO(s)+2SO2(g)ΔG=ΔG(products )−ΔG(reactan ts )=[(−480)+(−544)−(−293)]=−1024+293=−731kJ

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The factor of values are important in metallurgy. The $∆ G$ values for the following reactions at 800°C are given as
$\begin{array}{l} S_{2} (s) + 2 O_{2} (g) \to 2 {SO}_{2} (g), ΔG = - 544 kj \\ 2 Zn (s) + S_{2} (s) \to 2 ZnS (s), ΔG = - 293 kj \\ 2 Zn (s) + O_{2} (g) \to 2 ZnO (s), ΔG = - 480 kj \end{array}$
The $∆ G$ for the reaction,
$2 ZnS (s) + 3 O_{2} (g) \to 2 ZnO (s) + 2 {SO}_{2} (g)$
will be

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-357 kJ

-731kJ

-673kJ

-229KJ

answer is B.

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Detailed Solution

$∆ G$ of formation of different substance are as
2SO₂ = -544 kJ
2Zns = -293 kJ
2ZnO = -480 kJ
For the reaction,
$\begin{array}{l} 2 ZnS + 3 O_{2} (g) \to 2 ZnO (s) + 2 {SO}_{2} (g) \\ ΔG = [{ΔG}_{(products)} - {ΔG}_{(reactan ts)}] \\ = [(- 480) + (- 544) - (- 293)] \\ = - 1024 + 293 = - 731 kJ \end{array}$