Two reactions of iron with oxygen are shown.
Fe(s) + $\frac{1}{2}$O$_2$(g) $\to$ FeO(s) ΔH = – 272 kJ mol$^{–1}$َ
2Fe(s) + $\frac{3}{2}$O$_2$(g) $\to$ Fe$_2$O$_3$(s) ΔH = – 822 kJ mol$^{–1}$
What is the enthalpy change, in kJ mol$^–1$, for this reaction?
2FeO(s) + $\frac{1}{2}$O$_2$(g) $\to$ Fe$_2$O$_3$(s)
1 )
+550
–278
3 )
–1094
4 )
–1372
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