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Is Time's Asymmetry Related to Irreversible Processes and the Second Law?
1Department of Physical Chemistry, Edmond J. Safra Campus, The Hebrew University, Jerusalem 91904, Israel.
Entropy (Basel, Switzerland)
|September 28, 2023
Summary
Time cannot decrease, but irreversible processes, often linked to time's arrow, can be reversed with very low probability. Entropy and the Second Law are timeless, unrelated to time's direction.
Area of Science:
- Thermodynamics
- Philosophy of Time
- Statistical Mechanics
Background:
- The unidirectional nature of time, often termed 'time's arrow,' is commonly associated with irreversible processes.
- The Second Law of Thermodynamics and entropy are frequently cited as fundamental to this unidirectional flow.
Purpose of the Study:
- To re-evaluate the relationship between time's properties, irreversible processes, and the concept of time's arrow.
- To investigate the timelessness of entropy and the Second Law in relation to time.
Main Methods:
- Conceptual analysis of time's properties, specifically its non-decreasing nature.
- Examination of the reversibility of irreversible processes, considering probabilistic outcomes.
- Philosophical and physical interpretation of entropy and the Second Law.
Main Results:
- Time's inability to decrease is confirmed as a fundamental property.
- Irreversible processes, while predominantly unidirectional, are shown to be reversible under specific, albeit highly improbable, conditions.
- Entropy and the Second Law are argued to be timeless concepts, independent of the directionality of time.
Conclusions:
- The established link between irreversible processes and time's arrow requires re-examination.
- The fundamental nature of time and its properties are distinct from the principles of thermodynamics and statistical mechanics concerning directionality.
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