Problem: Calculate ΔH°298 for the process Co3O4(s) ⟶ 3Co(s) + 2O2(g) from the following information: Co(s) + 1/2O2(g) ⟶ CoO(s)  ΔH°298 = −237.9kJ 3CoO(s) +1/2O2(g) ⟶ Co3O4(s)  ΔH°298 = −177.5kJ

FREE Expert Solution

 [Co(s) + 1/2O2(g)  CoO(s)]×3  ΔH°298 = −237.9kJ ×3

3 Co(s) + 3/2O2(g)  3 CoO(s) Δ298 = −713.7 kJ

3 CoO(s) +1/2O2(g)  Co3O4(s)  ΔH°298 = −177.5kJ

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Problem Details

Calculate ΔH°298 for the process Co3O4(s)  3Co(s) + 2O2(g) from the following information:
 Co(s) + 1/2O2(g) 
 CoO(s)  Δ298 = −237.9kJ 

3CoO(s) +1/2O2(g)  Co3O4(s)  ΔH°298 = −177.5kJ

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