Use Hess's Law to Calculate Δ_rG° Using the Following Information

question 115

Multiple Choice

Use Hess's law to calculate Δ_rG° using the following information: CO(g) → C(s) + 1/2 O₂(g) Δ_rG° = ?
CO₂(g) → C(s) + O₂(g) Δ_rG° = +394.4 kJ mol^-1
CO(g) + 1/2 O₂(g) → CO₂(g) Δ_rG° = -257.2 kJ mol^-1

• A) -60.0 kJ mol^-1
• B) +651.6 kJ mol^-1
• C) -265.8 kJ mol^-1
• D) +137.2 kJ mol^-1
• E) +523.0 kJ mol^-1

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