![]() It is often said that modern gasoline engines cannot be made to be significantly more efficient. Rather, the energy is released into the environment, implying that the engine is quite inefficient. But most of the heat transfer produced from burning fuel in the engine does not do work on the gas. Work is done by the gas as it exerts a force through a distance, converting its energy into a variety of other forms-into the car’s kinetic or gravitational potential energy into electrical energy to run the spark plugs, radio, and lights and back into stored energy in the car’s battery. ![]() A car engine, for example, burns fuel for heat transfer into a gas. ![]() It can also be converted to any other form of energy. Heat transfer is energy in transit, and it can be used to do work.
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