What is the second law of thermodynamics?



Second law of thermodynamics : The second law of thermodynamics has Kelvin-Planck statement and Kelvin-Clausius statement. They are stated below.






Kelvin-Planck statement : Kelvin-Planck statement of the second law states that, it is impossible to get a continuous supply of work from a body which can transfer heat with a single heat reservoir.

Kelvin-Clausius Statement : Kelvin-Clausius statement has two parts; Kelvin part and Clausius part. They are stated below.

          Kelvin part : It is impossible to get a continuous supply of work from a body by cooling it to a temperature lower than that of its surroundings.

          Clausius part : It is impossible to make heat flow from a body at a lower temperature to a body at a higher temperature without doing external work on the working substance.

Read about the first law of thermodynamics here.

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