Second Law of Thermodynamics

Clausius statement
No process is possible whose sole result is the transfer of heat from a colder to a hotter body.

Kelvin-Planck statement
No process is possible whose sole result is the absorption of heat from a reservoir and the conversion of all of this heat into work.

Carnot's theorems:
i)No engine can be more efficient than a reversible engine working between the same limits of temperature.
ii)All reversible engines working between the same two limits of temperature have the same efficiency.


See also: Clausius, Rudolph Julius Emmanuel, First Law of Thermodynamics, Third Law of Thermodynamics, Zeroth Law of Thermodynamics.

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Subjects: Thermodynamics