Which of the following reaction cannot be used to define the heat of formation of \( \mathrm{CO}...

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Which of the following reaction cannot be used to define the heat of formation of \( \mathrm{CO}_{2}(\mathrm{~g}) \) ?
(a) \( \mathrm{CO}(\mathrm{g})+\frac{1}{2} \mathrm{O}_{2} \longrightarrow \mathrm{CO}_{2}(\mathrm{~g}) \)
(b) \( \mathrm{C}_{6} \mathrm{H}_{6}(\ell)+\frac{7}{2} \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow 6 \mathrm{CO}_{2}(\mathrm{~g})+3 \mathrm{H}_{2} \mathrm{O}(\ell) \)
(c) \( \mathrm{C} \) (diamond) \( +2 \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{CO}_{2}(\mathrm{~g}) \)
(d) \( \mathrm{C} \) (graphite) \( +\mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{CO}_{2}(\mathrm{~g}) \)
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