A gallon of liquid gasoline contains about 131 MJ (124,340 Btu) of energy. This fuel is atomized and burned with the oxygen contained in air in an internal combustion (IC) engine. This energy (heating value) is released in an ideal or complete combustion process. An internal combustion engine produces shaft work. The typical internal combustion engine has a 25% thermal efficiency. What is the amount of shaft work produced by a typical IC engine per gallon? The remainder of the energy released in the combustion is in the form of heat, which is transferred to the IC engine coolant (antifreeze) and rejected into the atmosphere through the radiator as waste heat. How much waste heat is rejected per gallon of fuel burned.