What happens to the stored energy when a compressed spring is dissolved in acid?

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    Dissipation Energy
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Discussion Overview

The discussion revolves around the effects of dissolving a compressed spring in acid compared to a non-compressed spring, focusing on the behavior of stored energy during the dissolution process. The scope includes theoretical considerations of energy dissipation, thermodynamics, and potential experimental implications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions what happens to the stored energy in a compressed spring when dissolved in acid, contrasting it with a non-compressed spring.
  • Another participant expresses interest in conducting an experiment to explore the question further.
  • It is suggested that the energy of the compressed spring may dissipate slowly, with considerations of how the spring's cross-section and spring constant might change during dissolution.
  • Some participants propose that the energy would be dissipated as heat during the reaction with the acid.
  • One participant notes that acid-base reactions are typically exothermic and speculates that the reaction with a compressed spring might be even more exothermic due to the higher potential energy associated with the compressed structure.
  • Another participant agrees that compressing the spring alters the lattice energy of the metal, which could affect the thermicity of the reaction.

Areas of Agreement / Disagreement

Participants express varying degrees of uncertainty regarding the specific outcomes of the energy dissipation process, with some suggesting heat dissipation while others explore the implications of potential energy changes. No consensus is reached on the exact behavior of the stored energy.

Contextual Notes

Participants mention the need to consider the thermodynamic properties of the acid reaction and the effects of compression on the spring's material properties, indicating that assumptions about energy dissipation and reaction thermicity may depend on specific conditions.

ravishankar_v
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I have a question:

2 glass containers have the same amount of a particular acid. In one container, drop a fully compressed spring retained in the compressed state by some means. In another container, drop a similar spring, in its free form. The acid in the containers start to dissolve the spring material. What happens to the stored energy in one of the spring, which was compressed earlier?
 
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interesting question. I have no idea. I kind of want to try this experiment out.
 
I would imagine that energy of the compressed spring is slowly dissipated, as opposed to a more irreversible processes. Think about what happens when the cross section of the springs becomes smaller, would the spring constant change? The thermodynamics of the acid reaction with the compressed spring will differ from an ordinary reaction (non-compressed spring), in the former you have more energy released, at the molecular level the atoms are somewhat more closer together, the PE is higher, similar to a situation in an organic molecule where you have a steric strain.

Others may be able to give you a more official/detailed explanation, try one of the physics/quantum subforums.
 
the energy would be dissipated as heat?
 
acid base reactions are exothermic at standard conditions (arrhenius acid base that is, and I do not know of any that are endothermic, consider the bond energies of products and reactants; so you'll need to consider a limited physical/engineering situation for endothermicity...), I would imagine that an acid base reaction with a compressed/"pressurized" molecular structure would be even more exothermic, yes I think it would be dissipated as heat. The network would have more PE associated with them due to strain probably.
 
Simply speaking, by compressing the spring you are changing the lattice energy for the metal. This will naturally affect the thermicity of the reaction as expected.

(I agree with GCT : It's exactly the same as changing the PE by a steric strain.)
 

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