### Consider the formation of ammonia: \mathrm{N}_…

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Problem 107

In the process of respiration, glucose is oxidized completely. In fermentation, $\mathrm{O}_{2}$ is absent and glucose is broken down to ethanol and $\mathrm{CO}_{2}$ . Ethanol is oxidized to $\mathrm{CO}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$ .
(a) Balance the following equations for these processes:
Respiration: $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}(s)+\mathrm{O}_{2}(g) \rightarrow \mathrm{CO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l)$
Fermentation: $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}(s) \longrightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)+\mathrm{CO}_{2}(g)$
Ethanol oxidation: $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{CO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l)$
(b) Calculate $\Delta G_{\mathrm{rxn}}^{\circ}$ for respiration of 1.00 $\mathrm{g}$ of glucose.
(c) Calculate $\Delta G_{\mathrm{rxn}}^{\circ}$ for fermentation of 1.00 $\mathrm{g}$ of glucose.
(d) Calculate $\Delta G_{\mathrm{rxn}}^{\circ}$ for oxidation of the ethanol from part (c).

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Chapter 20
Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions
CHEMISTRY: The Molecular Nature of Matter and Change 2016

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