Do the electrons spend energy, and where that energy goes?

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    Electrons Energy
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Discussion Overview

The discussion centers on whether electrons "spend" energy during their motion, particularly when moving through atomic orbitals, and explores the implications of energy transfer in various contexts, including classical and quantum mechanics.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants question the meaning of "spend" in relation to energy, suggesting terms like "use" or "require" might be more appropriate.
  • It is proposed that electrons gain kinetic energy from electric fields, which may imply they do not "spend" energy in certain contexts.
  • One participant states that when electrons lose energy, it is emitted as photons, referencing Brehmstralung, but notes that in the absence of external forces, electrons do not necessarily spend energy.
  • Another participant suggests that electrons in orbitals do not spend energy, as each orbital corresponds to a specific energy level.
  • A comparison is made between electron motion and planetary motion, questioning whether electrons in orbitals are "moving" in a classical sense.
  • One participant argues that if electrons were to move like planets, they would emit energy, which raises questions about the nature of their motion and energy emission.

Areas of Agreement / Disagreement

Participants express differing views on whether electrons spend energy while in orbitals, with no consensus reached. Some argue that electrons do not spend energy in orbitals, while others suggest that energy dynamics depend on the context of their motion.

Contextual Notes

The discussion includes assumptions about classical versus quantum descriptions of electron behavior and the implications of energy transfer in different scenarios, which remain unresolved.

Physicsissuef
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do the electrons "spend" energy, and where that energy goes?

do the electrons "spend" energy, and where
that energy goes?
 
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What do you mean by 'spend' ? Use ? Require ?
What are these electrons doing ? Electrons are put in motion by electric fields, and take potential energy from the field which becomes kinetic energy.
 
When they lose energy it goes into photons (light).
Check out Brehmstralung.

http://en.wikipedia.org/wiki/Brehmstralung

But in the absence of something to slow it, there's no reason for it to use/spend energy.
 
K.J.Healey said:
When they lose energy it goes into photons (light).
Check out Brehmstralung.

http://en.wikipedia.org/wiki/Brehmstralung

But in the absence of something to slow it, there's no reason for it to use/spend energy.

I mean when they move through their orbitals, do they spend energy?
 
Physicsissuef said:
I mean when they move through their orbitals, do they spend energy?

Well, we do mostly believe that each orbital corresponds to a particular energy level, so I'd imagine that would mean they don't spend energy.
 
Physicsissuef said:
I mean when they move through their orbitals, do they spend energy?

As the Earth moves around the sun, does it spend energy? :smile:

Then there's the question of whether an electron in an atomic orbital is "moving" in the classical sense... but that belongs in the Quantum Physics forum.
 
So it is like I through a ball, and it will have just kinteic energy, right?
 
Physicsissuef said:
I mean when they move through their orbitals, do they spend energy?

No - as far as i know.
The electrons do not move around the nucleus as the Earth moves around the sun.
The electrons are described by a wave function which related to the probability of finding the electrons in any location around the nucleus, the electron is not "there" , the constant probability of finding the electron there is "there" and it's spread around the nucleus.
When charge particles accelerate they emit energy as electromagnetic radiation, if the electron was moving around the nucleus as the Earth moves around the sun it would emit all its energy.
 

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