Irreversible processes are physical transformations that cannot be reversed to restore the original state of the system without some permanent change. These processes often lead to an increase in entropy and are a key feature in understanding the directionality of natural phenomena, especially in relation to energy transformations and the flow of time. In statistical mechanics, the behavior of systems undergoing irreversible processes is often analyzed through concepts like the ergodic hypothesis and the second law of thermodynamics.
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