Isooctane (C8H18; d _ 0.692 g/mL) is used as the fuel in a test of a new automobile

Chapter 6, Problem 6.89

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Isooctane (C8H18; d _ 0.692 g/mL) is used as the fuel in a test of a new automobile drive train. (a) How much energy (in kJ) is released by complete combustion of the isooctane in a 20.4-gal fuel tank to gases (_H_rxn _ _5.44 103 kJ/mol)? (b) The energy delivered to the wheels at 65 mph is 5.5 104 kJ/h. Assuming all the energy is transferred to the wheels, what is the cruising range (in km) of the car on a full tank? (c) If the actual range is 455 miles, explain your answer to (b).

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