The correct answer is C. 39400 kJ/kg.
The heat value of combustion of gasoline is the amount of heat released when one kilogram of gasoline is burned completely. It is a measure of the energy content of gasoline and is used to calculate the fuel efficiency of gasoline-powered engines.
The heat value of combustion of gasoline is approximately 39400 kJ/kg. This means that when one kilogram of gasoline is burned completely, it releases 39400 kilojoules of heat. This heat can be used to power a gasoline-powered engine, which in turn can be used to move a car or other vehicle.
The heat value of combustion of gasoline is a valuable piece of information for engineers and scientists who design and study gasoline-powered engines. It can be used to calculate the fuel efficiency of engines, to design engines that are more efficient, and to study the environmental impact of gasoline-powered engines.
The other options are incorrect because they do not represent the actual heat value of combustion of gasoline. Option A is too low, option B is too high, and option D is not a valid option.