Entropy
What is Entropy? Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty. First law of thermodynamics The first law of thermodynamics states that energy can neither be created nor destroyed, only altered in form. Second law of thermodynamics Kelvin & Planck statement "No (heat) engine whose working fluid undergoes a cycle can absorb heat from a single reservoir, deliver an equivalent amount of work, and deliver no other effect" Clausius statement "No machine whose working fluid undergoes a cycle can absorb heat from one system, reject heat to another system and produce no other effect" Both statements of the Second Law constrains the First Law of Thermodynamics by identifying that energy goes downhill. The Second Law is concerned with Entropy (S) which is produced by all processes and associated with the loss of ability to do work. The Second Law states that the entropy of the universe increases.