Second law of thermodynamics

 Second law of thermodynamics: 

Clausius statement :

It state that, it is impossible to construction of system, heat can never transfer to coller body to warmer body without any external device. 

Kelvin planks statement : 

It is impossible to construction a machine which total heat  energy is convert into mechanical energy or useful 

Rejection heat should zero 

Heat energy is equal to mechanical energy 

Efficiency = 100% 


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