The Second Law of Thermodynamics

The Second Law of Thermodynamics states that in any energy exchange, if no energy enters or leaves the system, the total entropy (or disorder) of the system tends to increase over time. This means that natural processes tend to move towards greater chaos or disorder. For example, if you mix hot and cold water, they will eventually reach an even temperature rather than spontaneously separating. In essence, energy dissipates and systems become less organized without input of energy, pointing to the direction of time and the inevitability of change in natural processes.