anonymous
  • anonymous
What factors or parameters prevent us from creating a reversible heat engine? Is it simply due to the micro/macroscopic work done between surfaces and heat generated from friction (with the latter creating a net positive entropy generation from dS=dQ/T)?
Physics
jamiebookeater
  • jamiebookeater
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ybarrap
  • ybarrap
You got it! This is why perpetual motion machines are impossible - friction. The lost energy due to friction can not be recovered without some external work done TO the engine.

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