C(s)+H
2
O(g)→CO(g)+H
2
(g)ΔH
°
=+131kJ/mol
rxn
The reaction between C(s)
and H
2
O(g)
is represented by the balanced chemical equation above. Based on the enthalpy change of the reaction (ΔH
°
) and the standard heats of formation (ΔH
°
f
) given in the table below, what is the approximate ΔH
°
f
for CO(g)
?
SubstanceΔH
°
f
(kJ/mol
)C(s)
0H
2
O(g)
−242
CO(g)
?
H
2
(g)
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