Solved

Ethanol Is Being Promoted as Renewable Biofuel A) - 1,280 KJ/mol
B) - 400 KJ/mol
C)

Question 93

Multiple Choice

Ethanol is being promoted as renewable biofuel. Use the standard enthalpies of formation below to determine the standard enthalpy of combustion of ethanol.  Substance ΔHf in kJ/mol CH3CH2OH(l) 277CO2(g) 394H2O(l) 286\begin{array} { | c | c | } \hline \text { Substance } & \mathbf { \Delta H } \\& \circ \\& \mathrm { f } \\& \text { in kJ/mol } \\\hline \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } ( l ) & - 277 \\\hline \mathrm { CO } _ { 2 } ( g ) & - 394 \\\hline \mathrm { H } _ { 2 } \mathrm { O } ( l ) & - 286 \\\hline\end{array}


A) - 1,280 kJ/mol
B) - 400 kJ/mol
C) + 400 kJ/mol
D) - 1,430 kJ/mol
E) - 1,370 kJ/mol

Correct Answer:

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