Question

Ethanol (CH3CH2OH) has been suggested as an alternative fuel source. Ethanol's enthalpy of combustion is delta H comb = -1368 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/m1.? (1 gal = 3.785 1.; d= 0.703 g/mL)