# Problem: Given the following reactions Fe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g) ∆H = -28.0 kJ 3Fe (s) + 4CO2 (s) → 4CO (g) + Fe 3O4 (s) ∆H = +12.5 kJ the enthalpy of the reaction of Fe 2O3 with CO 3Fe2O3 (s) + CO (g) → CO2 (g) + 2Fe3O4 (s) is ________ kJ.   a) 40.5 b) +109 c) -15.5 d) -109 e) -59.0

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Given the following reactions

Fe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g) ∆H = -28.0 kJ

3Fe (s) + 4CO2 (s) → 4CO (g) + Fe 3O4 (s) ∆H = +12.5 kJ

the enthalpy of the reaction of Fe 2O3 with CO

3Fe2O3 (s) + CO (g) → CO2 (g) + 2Fe3O4 (s)

is ________ kJ.

a) 40.5

b) +109

c) -15.5

d) -109

e) -59.0

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