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Calculate Δ\Delta G \circ for the Combustion of Ethanol Vapor, C2H5OH(g), at 750

Question 71

Multiple Choice

Calculate Δ\Delta G \circ for the combustion of ethanol vapor, C2H5OH(g) , at 750 \circ C in oxygen to form carbon dioxide and water vapor. The following data is valid at 25 \circ C: ΔHf(kJ/mol) ΔGf(kJ/mol) C2H5OH( g) 234.8167.9O2(g) 00H2O(g) 241.8228.6CO2(g) 393.5394.4\begin{array}{lcc}&\Delta \mathrm{H}_{\mathrm{f}}^{\circ}(\mathrm{kJ} / \mathrm{mol}) & \Delta \mathrm{G}_{\mathrm{f}}^{\circ}(\mathrm{kJ} / \mathrm{mol}) \\\hline\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(\mathrm{~g}) & -234.8 & -167.9 \\\mathrm{O}_{2}(\mathrm{g}) & 0 & 0 \\\mathrm{H}_{2} \mathrm{O}(\mathrm{g}) & -241.8 & -228.6 \\\mathrm{CO}_{2}(\mathrm{g}) & -393.5 & -394.4\end{array}


A) -1407 kJ/mol
B) -2151 kJ/mol
C) -1307 kJ/mol
D) -4486 kJ/mol
E) -1377 kJ/mol

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