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Ethanol(C2H5OH)and gasoline (assumed to be all octane,C8H18) areboth used as automobile fuel. If gasoline is selling for $3.19/gal,what would the price of ethanol have to be in order to provide thesame amount of heat per dollar? The density andΔH
of octane are 0.7025 g/mL and −249.9 kJ/mol and thedensity and ΔH
of ethanol are 0.7894 g/mL and −277.0 kJ/mol,respectively. Assume that the products of combustion areCO2(g) andH2O(l). (1gal = 3.785 L)
