Second Law of Thermodynamics (Law of Entropy Increase)

The Second Law of Thermodynamics states that in an isolated system, disorder or randomness—called entropy—tends to increase over time. This means processes naturally move towards a state of greater chaos or energy dispersal, making it impossible to revert to the original, more ordered state spontaneously. For example, hot coffee cools down while the room warms slightly, blending energy unevenly. This law explains why many natural processes are irreversible and why systems tend toward equilibrium, emphasizing that order requires energy input, and disorder is the natural trend in the universe.