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Section 4: Calculating Enthalpy Change

Calculating Enthalpy Changes

1.
Calculate ΔH° for the following reaction.
Fe3O4(s) + CO(g) → 3FeO(s) + CO2(g) ΔHf°(kJ/mol) -1118 -110.5 -272 -393.5
A)-263 kJ
B)54 kJ
C)19 kJ
D)neg. 50 kJ
2.
Calculate the enthalpy for the reaction:
2ZnS(s) + 3O2(g) → 2ZnO (s) + 2SO2(g) ΔHf° (kJ/mol) -206.0 0 -348.3 –296.8
A)-270.6 kJ
B)-878.2 kJ
C)+270.6 kJ
D)+878.2 kJ
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