2nd Law & Entropy
Entropy, 2nd Law
Entropy and the second law of thermodynamics are tough subjects to cover lightly. Entropy can be thought of as a measure of how much thermal energy per degree Kelvin is unavailable to do work. It is also a measure of disorder in a system. The second law of thermodynamics states that an isolated system will increase its entropy until it reaches equilibrium, where at that point the entropy is maximum and the system is the most disordered.