In an engine, fuel and oxygen chemically react and release energy. What happens to the energy NOT used by the engine?

A.
It has been destroyed.

B.
It is lost in the form of heat and sound.

C.
It remains stored in the chemical bonds of the fuel.

D.
It is converted into methane.

1 answer

The correct answer is:

B. It is lost in the form of heat and sound.

In an engine, not all of the energy released from the chemical reaction of fuel and oxygen is converted into useful work; some of it is dissipated as heat and sound.