SECOND LAW OF THERMODYNAMICS

SECOND LAW OF THERMODYNAMICS

Kelvin Statement 
       
        It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature  of coldest of the surrounding object.


Planck Statement 

        It is impossible to construct  all engine which  works in a complete  cycle will produce no effect other than raising of a weight and cooling of a heat reservoir.



Kelvin - planck Statement 


        It is impossible to construct a device which operating in a cycle has the sole effect of extracting heat from the reservoir and performing equivalent amount of work.

Perpetual Motion Machine of second kind

  
       A device which operates by utilizing the internal energy of a single heat reservoir, is called perpetual Motion machine  of second kind. 

Clausius Statement 


       It is impossible for a self acting machine working in a cycle process, unaided by any external agency to transfer heat from a body at a lower temperature  to a body at a higher temperature.
       In other words, heat cannot flow itself from a colder to a hotter body
     

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