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Which is an impossible value of efficiency for a heat engine?
100% efficiency is impossible for a heat engine working between two reservoirs at different temperatures according to the second law of thermodynamics.
How does energy efficiency relate to the first and second law of thermodynamics?
By the first law of thermodynamics, energy is conserved - i.e. the sum of the useful work and the energy lost to heat will equal the energy you started with. The second law states that you will never get 100% energy efficiency.
Can a heat engine convert its entire heat into work?
No, due to the second law of thermodynamics, a heat engine cannot convert all of its heat energy into work. Some heat will always be lost to the surroundings, decreasing the efficiency of the process.
Which law of thermodynamics states that the heat engine cannot be completely efficient?
True
What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?
A heat engine can never be 100% efficient due to the second law of thermodynamics, which states that some heat energy will always be lost to the surroundings. The temperature required for maximum efficiency is the temperature of the heat source for the engine. The efficiency of a heat engine is determined by the temperature difference between the heat source and the environment.
Which is an impossible value of efficiency for a heat engine?
100% efficiency is impossible for a heat engine working between two reservoirs at different temperatures according to the second law of thermodynamics.
Whose work on heat engines lead to the formulation of the second law of thermodynamics?
The work of Sadi Carnot, a French engineer, on the efficiency of heat engines in the early 19th century led to the formulation of the second law of thermodynamics. Carnot's insights on the limitations of heat engine efficiency laid the foundation for the development of the second law, which eventually became a fundamental principle in thermodynamics.
How does energy efficiency relate to the first and second law of thermodynamics?
By the first law of thermodynamics, energy is conserved - i.e. the sum of the useful work and the energy lost to heat will equal the energy you started with. The second law states that you will never get 100% energy efficiency.
Can a heat engine convert its entire heat into work?
No, due to the second law of thermodynamics, a heat engine cannot convert all of its heat energy into work. Some heat will always be lost to the surroundings, decreasing the efficiency of the process.
Why can't electric suppliers use electric motors to spin the generators?
If you are suggesting a "perpetual motion" scenerio, it would violate the first or second laws of thermodynamics. Many inventors dream of perpetual motion machines, but they are an impossible dream according to the laws of thermodynamics. The second law of thermodynamics says that an engine or process of any type must always have an efficiency of less than 100%. A perpetual motion machine that uses a generator to power the motor that runs the generator requires both the generator and motor to operate with 100% efficiency. This type of perpetual motion machine does not violate the first law of thermodynamics, but violates the second law of thermodynamics. It is a perpetual motion machine of the second kind because it violates the second law of thermodynamics. Not even the cleverest engineer or inventor can build a perpetual motion machine because it would violate either the first or second law of thermodynamics, which are fundamental laws of physics.
Which law of thermodynamics states that the heat engine cannot be completely efficient?
True
What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?
A heat engine can never be 100% efficient due to the second law of thermodynamics, which states that some heat energy will always be lost to the surroundings. The temperature required for maximum efficiency is the temperature of the heat source for the engine. The efficiency of a heat engine is determined by the temperature difference between the heat source and the environment.
Whose statement declares there can be no perfect heat engines?
The statement that there can be no perfect heat engines is declared by the Second Law of Thermodynamics. This law states that it is impossible for any heat engine to have 100% efficiency in converting heat into work.
What is the maximum efficiency possible in an energy conversion process that isn't limited by the second law of thermodynamics?
1) Any physical process is subject to the Second Law. Assuming otherwise would not be a realistic description of our Universe. 2) The maximum possible efficiency is a factor of 1 (equivalent to 100%). If some energy is wasted, as is usually the case, the actual amount will be somewhat less.
What is the carnot statement of the second law of thermodynamics?
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
Why the first and second law of thermodynamics may be states you can not get ahead and you can not break even?
According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.
What are those formula in second law?
The second law of thermodynamics can be expressed using different formulations including Carnot's principle, the Clausius statement, and the Kelvin-Planck statement. These laws essentially state that heat naturally flows from hot to cold objects and that it is impossible to create a heat engine with 100% efficiency.
