In an engine, fuel and oxygen chemically react and release energy. What happens to the energy NOT used by the engine?
O 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.
B. It is lost in the form of heat and sound.
To determine what happens to the energy not used by the engine, we need to understand the concept of energy conservation. In any system, energy cannot be created or destroyed, but it can be transformed from one form to another.
In the case of an engine, when fuel and oxygen chemically react, they release energy in the form of heat and sound. This energy is used to perform work, such as moving the vehicle or generating electricity. However, not all of the energy produced during the combustion process is converted into useful work.
The correct answer is B. It is lost in the form of heat and sound. This means that some of the energy released is dissipated into the surroundings as waste heat and sound, rather than being converted into useful mechanical or electrical energy.
Therefore, the energy not used by the engine is converted into heat and sound, which are forms of energy that typically cannot be harnessed for further useful work.