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How efficient is a normal car engine what percentage of energy is converted into useful energy?
Wiki User
∙ 10y ago
The answer is 20-25% so about ¾ of the chemical energy is wasted, i.e. not turned into kinetic energy of the car.
Engine efficiency is limited by the maximum temperature and pressure that a normal cylinder block can take. Diesel engines run at higher temperature/pressure and are more efficient but have to be more massively built.
Another form of wasted energy is the water produced by the burning action of the hydrogen in the fuel with oxygen from the air. It comes in the form of steam and the energy of the steam is wasted by being sent out through the exhaust pipe (you can see the water dripping out of the exhaust when the car is cold, because there is time for it to condense in the cold exhaust system).
Wiki User
∙ 10y ago
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Why efficiency of heat engine has no unit?
It is a ratio or percentage. For example, if 1/2 of energy of an engine is wasted, it is 1/2, or 50%, efficient. In ratios, units cancel out.
How is energy from chemical energy released and transferred into thermal energy?
Chemical compounds, like oil or coal, hold potential chemical energy in the powerful molecular bonds with the compound. If such a chemical compound undergoes a chemical reaction (in this case in an internal combustion engine), the potential chemical energy will be released in the form of thermal energy. Of course, no energy transformation is 100% efficient as some of the potential chemical energy is either not converted at all or converted into a different form of energy. Take the example of a fire in one's fire place. Although a large percentage of the potential chemical energy in the wood is converted into thermal energy that we can feel as heat, some of the energy is converted into light, that we can see as the brightness of the fire, and some is converted into sounds, as we can hear in the roaring of the fire.
What is Thermal energy that is converted into mechanical energy?
steam engine
Can one form of energy be converted to another?
Yes, it can be converted into another kind of Energy. Example: The chemical energy of petroleum is converted to mechanical energy in a car engine with some loss as heat and sound energy. The mechanical energy is converted to kinetic energy.
What kind of energy in car engine?
Chemical energy is being converted to thermal energy which is then converted to mechanical energy and finally to kinetic energy which moves the car. Kinetic energy is then converted to thermal energy in the brakes to stop the car.
How can you convert nuclear energy into energy that you can use?
First it is converted into heat. This is then usually converted to other types of energy through a steam engine.
When gasoline is burned in a car engine what energy is converted into another energy?
Chemical Energy into Mechanical Energy
Why is engine running?
Energy getting converted from one form to other.
Describe the energy transformation that occurs as fuel is used by engine of a car?
chemical energy is converted to kinetic energy
Thermal energy that is not converted into work by a heat engine is called?
waste heat
What energy is in a car?
chemical from battery converted into electrical then the engine converts it to kinetic
What describes thermal energy that is not converted into work by a heat engine?
waste heat
