What happens to the energy when the universe dies out?

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Discussion Overview

The discussion revolves around the fate of energy in the universe as it approaches its end, exploring concepts related to thermodynamics, cosmology, and theories such as the "Heat Death" of the universe. Participants examine how energy behaves on a universal scale and the implications of dark energy on this behavior.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the fate of energy in the universe, noting the role of dark energy in accelerating the expansion of the universe and whether this implies an increase or stability in energy levels.
  • Another participant suggests that if the universe is viewed as a closed system, the second and third laws of thermodynamics imply that energy will transition from a higher energy state to a lower one, potentially dissipating across spacetime.
  • A different contribution highlights the complexity of defining energy on cosmological scales, referencing a resource that discusses this challenge.
  • Another participant introduces the "Heat Death" theory, describing it as a plausible but unprovable scenario for the universe's end, and mentions various theories regarding the fate of energy in this context.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of energy in the universe, with no consensus reached on how energy will ultimately be affected as the universe dies out. Multiple competing theories and interpretations are presented.

Contextual Notes

There are limitations regarding the definitions of energy on cosmological scales and the assumptions underlying the theories discussed, which remain unresolved.

louisbaron
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What happens to energy when the universe dies out? I understand how the law of conversation on energy works within a closed system(somewhat) but what about on the universal scale? If dark energy is accelerating planets outward isn't energy increasing or just staying proportionate?
 
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If you consider the universe as a closed system and consider the second and third laws of thermodynamics it will tend to go from a higher energy state to a lower one then I suspect the energy will be dissipated across the total expanse of spacetime.
 

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