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Calculate Delta(r) H^(@) for Fe(2) O(3) ...

Calculate `Delta_(r) H^(@)` for `Fe_(2) O_(3) (s) + 3 CO(g) to 2 Fe (s) + 3 CO_(2) (g) `
Given : `Delta_(f) H^(@) (Fe_(2) O_(3) , s) = -822.2 ` kJ/mol `Delta_(f) H^(@) (CO , g) = -110.5 kJ//mol , Delta_(f) H^(@) (CO_(2) , g) = -393.5` kJ/mol

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–26.8 kJ/mol
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