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

question 13

Multiple Choice

Ethanol (CH₃CH₂OH) has been suggested as an alternative fuel source. Ethanol's enthalpy of combustion is $\Delta$ 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

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