Multiple Choice Question
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.
B. It is lost in the form of heat and sound.
The correct answer is B. It is lost in the form of heat and sound.
The correct answer is B. It is lost in the form of heat and sound.
When fuel and oxygen react in an engine, the energy released from the chemical reaction is used to perform useful work, such as generating mechanical power. However, not all of the energy is converted into useful work. Some of the energy is lost in the form of heat due to friction and inefficiencies in the engine's operation. Additionally, some energy is also lost as sound, such as the noise emitted by the engine during combustion.
To determine the correct answer, it's important to understand the basic principles of energy conservation and the behavior of engines. In this case, the energy that is not used is not destroyed or converted into methane (option A and D), but instead it is dissipated as heat and sound (option B). This energy loss is a common characteristic of combustion engines and represents a limit to their efficiency.