Second Law of Thermodynamics MCQ - Practice Questions with Answers

Second Law of Thermodynamics 

It is not possible to convert heat into work without compensation. 

• Work can always be converted into heat but the conversion of heat into work does not take place under all conditions. 

• It is impossible to construct a machine that is able to convey heat by a cyclic process from a colder to a hotter body unless work is done on the machine by some outside agency (Clausius statement).

• The heat of the coldest body among those participating In a cyclic process cannot serve as a source of work (Thomson statement). 

• It is Impossible by means of the inanimate material agency to derive mechanical work or effort from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects (Kelvin-Planck statement)

• Nature tends to pass from a less probable to more probable state (Ludwig Boltzmann statement).

• Whenever a spontaneous process takes place it is accompanied by an Increase in the total entropy of the universe.