The enthalpy of combustion of hard coal averages 351 kJ/g, that of gasoline, 1.33 × 10⁵ kJ/gal. How many kilograms of hard coal provide the same amount of heat as is available from 120 gallon of gasoline? Assume that the density of gasoline is 0.7025 g/mL (the same as the density of isooctane).

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Enthalpy of combustion of hard coal 351 KJg 1 g 11000 kg Heating value of hard coal 35100 KJ ... View the full answer