Are nuclear or chemical energy release thermodynamic processes?

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Discussion Overview

The discussion revolves around whether nuclear and chemical energy release can be classified as thermodynamic processes. Participants explore the relationship between internal energy, temperature, and entropy in these contexts, questioning the applicability of thermodynamic principles to these energy releases.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant suggests that during nuclear reactions and combustion, if heat transfer is prevented, the internal energy remains constant while temperature increases, raising questions about how entropy varies under constant volume conditions.
  • Another participant argues that thermodynamics relies on a function of internal energy that depends on volume and temperature, implying that nuclear and chemical energy do not fit this framework and questioning their classification as thermodynamic processes.
  • A different participant notes that nuclear and chemical energy are forms of internal energy and seeks clarification on the relationship between entropy and temperature, particularly at absolute zero.
  • One participant points out potential confusion regarding the definitions of energy and entropy and suggests consulting an external article for clarification.
  • Another participant states that the processes being discussed are out of equilibrium, indicating that equilibrium thermodynamics cannot be applied to analyze them.

Areas of Agreement / Disagreement

Participants express differing views on whether nuclear and chemical energy releases can be considered thermodynamic processes, with no consensus reached. Some participants challenge the applicability of thermodynamic principles, while others defend the relevance of internal energy concepts.

Contextual Notes

There are unresolved questions regarding the definitions of energy and entropy, the conditions under which thermodynamic principles apply, and the implications of out-of-equilibrium processes.

Who May Find This Useful

This discussion may be of interest to those studying thermodynamics, energy transformations, or the principles governing nuclear and chemical reactions.

fxdung
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In process of releasing heat of nuclear reaction and burning oil, the internal energy of the material(that be burned) be contant if we prevent heat transfer to environment.The temperature of the material increase.How is entropy of the material varied(if we keep volume be constant)?If the entropy increase then we are leaded to wrong conclusion that temperature is zero(because temperature is equal derivative of internal energy respect to entropy)?Whether those processes are thermodynamics processes?
 
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I think Thermodynamics based on postulate that: Exist a function of internal energy depend to volume and temperature.But here, nuclear and chemistry energy do not depend on both volume and temperature.So this process is not involved in Thermodynamics.Is that correct?
 
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I search on web and see that nuclear and chemical energy are also internal energy,so please explain my question.

Entropy is the measure of the disorder of a system.There is a theorem saying that at temperature zero, then entropy is zero.But at temperature being zero, still having quantum disorder,so why entropy must be zero?
 
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The process you are describing is out of equilibrium. You cannot use equilibrium thermodynamics to study it.
 

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