Question

Given the following reactions:

Question (1)

Calculate for the change in enthalpy of the reaction of (3Fe2O3(s) + CO(g) yields CO2(g) + 2Fe3O4(s))

Fe2O3(s) + 3CO(g) yields 2Fe(s) + 3CO2(s)(Change in enthalpy= -28.0 kJ)

3Fe(s) + 4CO2(s) yields 4CO(g) + FE3O4(s) (Change in enthalpy= +12.5 kJ)

Answer 1

Fe2O3(s) + 3CO(g) yields 2Fe(s) + 3CO2(s) (Change in enthalpy= -28.0 kJ)

multiply above equation with 3

3Fe2O3(s) + 9CO(g) yields 6Fe(s) + 9CO2(s) (Change in enthalpy= -84.0 kJ) -------------- (1)

3Fe(s) + 4CO2(s) yields 4CO(g) + Fe3O4(s) (Change in enthalpy= +12.5 kJ)

multiply equation with 2

2Fe(s) + 8CO2(s) yields 8CO(g) + 2Fe3O4(s) (Change in enthalpy= +25 kJ) --------------------(2)

add equation 1 and 2

3Fe2O3(s) + 9CO(g) yields 6Fe(s) + 9CO2(s) (Change in enthalpy= -84.0 kJ) -------------- (1)

6Fe(s) + 8CO2(s) yields 8CO(g) + 2Fe3O4(s) (Change in enthalpy= +25 kJ) --------------------(2)

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3Fe2O3(s) + CO(g) yields CO2(g) + 2Fe3O4(s)) chanhe in enthalpy = - 59 .0KJ