Statements of the Second Law
A system operating in a thermodynamic cycle can not transfer energy (heat) from a cooler body to a hotter body and produce no other effect on the universe.
Kelvin - Planck Statement:
A system operating in a thermodynamic cycle can not produce a net amount of work while receiving heat from a single thermal reservoir.
Statements of the Second Law of Thermodynamics
The Kelvin-Planck Statement tells us that the efficiency of a heat engine must be less than 100%.
What is the maximum efficiency for a heat engine?
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