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What is the physical significance of entropy?
How does the concept of entropy relate to the concept of time?
The concept of entropy is closely related to the concept of time. In fact, entropy is often referred to as the arrow of time, as it is the reason why time flows in a particular direction. The second law of thermodynamics states that the entropy of a closed system will always increase over time, never decrease. This means that as time passes, energy becomes more and more disordered and less able to do work.