State the Second Law of Thermodynamics.

1.	State the Second Law of Thermodynamics.
Answer» (1) Clausius statement : It is impossible for a self acting machine to transfer heat from a colder body to a hotter one without the aid of an external agency. (2) Kelvin’s statement : It is impossible for a body or system to perform continuous work by cooling it to a temperature lower than the temperature of the coldest one of its surroundings. (3) Kelvin-Planck’s statement : It is impossible to design an engine that extracts heat and fully utilises into work without producing any other effect.

Answer»

(1) Clausius statement : It is impossible for a self acting machine to transfer heat from a colder body to a hotter one without the aid of an external agency.

(2) Kelvin’s statement : It is impossible for a body or system to perform continuous work by cooling it to a temperature lower than the temperature of the coldest one of its surroundings.

(3) Kelvin-Planck’s statement : It is impossible to design an engine that extracts heat and fully utilises into work without producing any other effect.

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