Answer Happy

Use the References to access important values if needed for this question. In walking a kilometer, you use about 100 kJ of energy. This energy comes from the oxidation of foods, which is about 30% efficient. How much energy do you save by walking 5.60 kilometers instead of driving a car that gets 7.83 km L-¹ of gasoline (18.4 miles per gallon)? Take the density of gasoline to be 0.680 g mL-¹ and its enthalpy of combustion to be -48.0 kJ g-¹. Submit Answer 5 question attempts remaining kJ