SECOND LAW OF THERMODYNAMICS INTRODUCTION: T hermodynamics has become part and parcel of our life. Whether travelling in a bus, sitting comfortably in an AC room or enjoying a cold coffee from the cafe , we observe and experience the applications of thermodynamics and its laws everywhere either directly or indirectly. When sadi carnot , father of thermodynamics proposed theorems and cycles of thermodynamics hardly anyone had imagined that his proposals would someday play such a significant role in the developement of automobile , which has become an iseperable part of our life today. Lord Kelvin and Rudolf Clausius developed the second law of thermodynamics in 1850's. Second Law of Thermodynamics : General statement: Heat always moves from hotter object to colder object , unless energy in some form is supplied to reverse the direction of heat flow. Kelvin Plank Statement : A heat engine cannot convert total heat supplied into the mechanical work. OR No heat engine can...