Problem: Calculate ΔHrxn for the following reaction: Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)Use the following reactions and given ΔH's.2 Fe(s) + 3/2 O2(g) → Fe2O3(s), ΔH = –824.2  kJCO(g) + 1/2 O2(g) → CO2(g), ΔH = –282.7  kJ

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We are asked to find ΔHrxn for the following reaction:  Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)


Modify the equation in such a way that it adds up to be the target reaction. 

Reaction                                                                                                Modification

Fe2O3(s) → 2 Fe(s) + 3/2 O2(g)                                                            -Eqn1   [reversed]
3 CO(g) +  3/2 O2(g)  → 3 CO2(g)                                                       +3Eqn2   [multiplied by 3]

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


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Problem Details

Calculate ΔHrxn for the following reaction: Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)
Use the following reactions and given ΔH's.
2 Fe(s) + 3/2 O2(g) → Fe2O3(s), ΔH = –824.2  kJ
CO(g) + 1/2 O2(g) → CO2(g), ΔH = –282.7  kJ

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Based on our data, we think this problem is relevant for Professor Grant's class at HUNTER.