Kelvin- Planck statement states that it is impossible to construct a device that operates on a cycle and produces no other effect than the transfer of heat from a single body in order to produce work.
Kelvin and Planck statements
The Kelvin-Planck statement is two different statements given by Lord Kelvin and Planck. They are known as Kelvin statement and Planck statement.
Kelvin statement stated that it is not possible to derive mechanical effect from any matter by cooling it below the highest cooling temperature of the surrounding objects.
Planck’s statement states that the total sum of entropies for the reversible system remains constant.
Clubbing both these statements the Kelvin-Planck statement was derived.
The kelvin-Planck statement is also known as the heat engine statement from the second law of thermodynamics states that it is not possible to design a device that works on a cycle and produces no other effect other than heat transfer from a single body for the production of work.