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Answered 2016-09-23 15:55:28

That is a consequence of the second and third laws of thermodynamics.

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The ideal reversible heat engine would follow or be equivalent to the Carnot cycle - but even that cycle is not 100% efficient - a manifestation of the second law of thermodynamics.


Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way. Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way.


Application of first law of thermodynamics is in engine, refrigerator,heat pump.


The engine was cleaner and more efficient.


Diesel engines are more efficient than gasoline engines.


to help improve the steam engine


to help improve the steam engine


The diesel is more efficient but more expensive to build.


To help improve the steam engine


A heat engine of 100 percent efficiency violates the second law of thermodynamics and is impossible even in theory.


It will depend upon the conditions. Under normal operating conditions a diesel engine is more efficient than a petrol engine.


Donald H. Marter has written: 'Thermodynamics and the heat engine' -- subject(s): Thermodynamics, Heat-engines


f an automobile had a 100 efficient engine would it exhaust the surroundings?


It has several forms, all of which are more or less equivalent, even though they don't seem so, at first glance. For example:No heat engine can be more efficient than a theoretical Carnot engine. In a closed system, entropy can never decrease.There are irreversible processes.


The efficiency of a quasi-static or reversible Carnot cycle depends only on the temperatures of the two heat reservoirs, and is the same, whatever the working substance. A Carnot engine operated in this way is the most efficient possible heat engine using those two temperatures


Even if the friction were totally eliminated, a heat engine still could not convert heat completely into work and be 100 percent efficient. Instead, the efficiency of an internal combustion engine depends on the difference in the temperature of the burning gases in the cylinder and the temperature of the burning gases in the cylinder and the temperature of the air outside the engine.


2.5 liter engine is smaller and more fuel efficient. 3.5 liter engine is a strong engine with better acceleration, but is less fuel efficient


The Variable Specific Impulse Magnetoplasma Rocket (VASIMR)is very likely the most efficient rocket engine.


Diesel engines are more efficient than gasoline because chambers are different. A diesel engine has better gas mileage.


It's an engine undergoing a Carnot cycle. Search for "carnot cycle" here on wikianswers if you don't know what that is.


I believe every area because physics about understanding. for example even though thermodynamics was found whilst trying to make a steam engine more efficient it can help us to understand our sun and solar system


completely handmade engine



The most efficient to date is a 2-stroke design. it is a turbo desiel 2-stroke. but normally a 4-stroke is usually the more efficient of the two engine types.


James Watt invented an efficient steam engine built in 1768.



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