Second law of Thermodynamics:
According to Second law the engine based on the cyclic process is not possible in which we can convert all the heat into the work. There are a number of statements for the second law but the two most common statements are.
- Kelvin plank statement
- Clausius Statement
Kelvin plank statement: No process is possible whose sole result is the absorption of heat from a reservoir and the conversion of all of this heat into work.
Clausius Statement: No process is possible whose sole result is the transfer of heat from a colder to a hotter body.