Use the Standard Reaction Enthalpies Given Below to Determine ΔH°_rxn

question 20

Multiple Choice

Use the standard reaction enthalpies given below to determine ΔH°_rxn for the following reaction:
2 S(s) + 3 O₂(g) → 2SO₃(g) ΔH°_rxn = ?
Given:
SO₂(g) → S(s) + O₂(g) ΔH°_rxn = +296.8 kJ
2 SO₂(g) + O₂(g) → 2 SO₃(g) ΔH°_rxn = -197.8 kJ

• A)-494.6 kJ
• B)-692.4 kJ
• C)-791.4 kJ
• D)-98.8 kJ
• E)-293.0 kJ

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