Is increase in entropy synonymous with the flow of time?

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Discussion Overview

The discussion centers around the relationship between entropy and the flow of time, particularly in the context of the second law of thermodynamics. Participants explore whether an increase in entropy is synonymous with the passage of time and how changes in entropy might affect physical processes, such as the rotation of the Earth.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants suggest that the second law of thermodynamics, being irreversible, correlates with the unidirectional flow of time and propose that entropy and time may be synonymous.
  • Others argue that a doubling of the rate of entropy would not necessarily result in the Earth spinning twice as fast, questioning the direct relationship between entropy and time.
  • A participant presents a thought experiment about increasing the rate of entropy and its potential effects on the aging process and physical motion, seeking to understand if such a change would require all motion in the universe to accelerate.
  • Some participants challenge the notion of a 'rate of entropy,' stating that it lacks formal meaning in thermodynamics and emphasizing the need for clear definitions in the discussion.
  • There is a contention regarding whether the universe's energy is decreasing and how that relates to entropy, with some asserting that the universe is an isolated system where energy remains constant.
  • Participants express frustration over the lack of clarity in terms and concepts, particularly regarding the hypothetical scenarios being proposed.

Areas of Agreement / Disagreement

Participants generally disagree on the relationship between entropy and time, with multiple competing views presented. The discussion remains unresolved, with no consensus on whether an increase in entropy can be equated with the flow of time.

Contextual Notes

Limitations include the ambiguity surrounding the term 'rate of entropy' and the lack of consensus on whether the universe's energy is decreasing or if it can be measured in a meaningful way. The discussion also highlights the challenges of defining hypothetical scenarios in thermodynamic contexts.

  • #31
I like thinking about time with an entropy perspective. In some ways its more intuitive than the usual relativistic way of looking at it. Clocks are devices which increase in entropy in a 'regular' fashion, with regular being defined as having constant ratios with other 'clocks'. The beginning of the universe has the lowest entropy possible, and thus was the earliest time possible. The macrostate of the small early universe has very, very few microstates associated with it. The end game of a heat death is a macrostate with the most possible microstates associated with it, this would be the end of time. If the universe is a closed system then both the early universe and late universe are accessible microstates and the entropy is constant, but any sub-system considered would not necessarily be like that.
 
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  • #32
Hypothetically speaking...if doubling the "rate" of entropy caused time to speed up, then as we measure rates with respect to time, there would be no change would there?

I am not sure I can back this statement up with sound arguments, but I think time is a quantity/entity that does not require entropy for rate or direction. Rather the opposite. Entropy cannot increase (or decrease) without the time dimension to exist within.
 

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