Sulfur Can Be Separated from Lead in the Mineral Galena $\rarr$

question 34

Multiple Choice

Sulfur can be separated from lead in the mineral galena, PbS(s) , by "roasting" the ore in the presence of oxygen as shown in the following reaction:
2PbS(s) + 3O₂(g) $\rarr$ 2PbO(s) + 2SO₂(g)
Calculate $\Delta$ S° for this reaction using the thermodynamic data provided below.

• A)-410 J/K·mol
• B)-161.5 J/K·mol
• C)-47.7 J/K·mol
• D)21.8 J/K·mol
• E)43.5 J/K·mol

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