Ethanol (CH₃CH₂OH) Has Been Suggested as an Alternative Fuel Source

Multiple Choice

Ethanol (CH₃CH₂OH) has been suggested as an alternative fuel source. Ethanol's enthalpy of combustion is H_comb  1,368 kJ/mol. What volume of ethanol (d  0.789 g/mL) is required to produce the same amount of energy as 1 gallon of gasoline, which can be modeled as isooctane (C₈H₁₈) with an energy density of 32.9 kJ/mL? (1 gal  3.785 L; d  0.703 g/mL)

A) 1.41 gal
B) 1.00 gal
C) 0.90 gal
D) 0.85 gal
E) 1.15 gal