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70. Explain why it is impossible to design a heat engine with 100% efficiency?erteuperatuOrEven Carnot engine cannot have 100% efficiency. Explain, Why?

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Answer: Another form of the Second Law of Thermodynamics or Carnot's Principle is that : It is not possible to make aheat enginewhose only effect is to absorbheatfrom a high-temperature region and turn all that heatinto work. ... Or, it is not possible todesign a heat enginethat has an efficiencyof 1.00 or100%

The second law of thermodynamics puts a fundamental limit on the thermalefficiencyof all heatengines. Even an ideal, frictionlessenginecan't convert anywhere near100% of its input heat into work. ... No device converting heat into mechanical energy, regardless of its construction, can exceed thisefficiency.



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