Nuclear Chemistry: Explaining Binding Energy and Mass Defect

Click For Summary

Discussion Overview

The discussion revolves around the concepts of binding energy and mass defect in nuclear chemistry, specifically addressing why energy is released when nucleons combine. Participants explore the nature of this energy release and the underlying forces involved.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why energy is released when nucleons combine, initially considering kinetic energy but expressing uncertainty about this explanation.
  • Another participant asserts that the energy released is potential energy, drawing parallels to other bound systems like the Moon-Earth system and referencing mass defect in relation to E=mc².
  • A further inquiry is made regarding the specific type of potential energy involved in the case of subatomic particles.
  • Responses identify the strong nuclear force and other forces (like the color force and electromagnetic force) as relevant to the potential energy in nucleons and quarks.

Areas of Agreement / Disagreement

The discussion contains multiple viewpoints regarding the nature of energy release and the types of potential energy involved, indicating that there is no consensus on these aspects.

Contextual Notes

Participants reference concepts like mass defect and E=mc² without resolving the complexities of these ideas or the implications of potential energy in nuclear systems.

spizma
Messages
34
Reaction score
0
I'm doing a nuclear chemistry project right now, and I am able to solve all of the problems involving binding energy and mass defect, however I have one conceptual question. Why is it that when the nucleons combine with each other they let off energy? At first I thought it was their kinetic energy being let off because they're being held in place by the strong nuclear force, but that seems wrong for some reason. My book doesn't go into any detail about this, can someone try explaining it? Thanks in advance.
 
Physics news on Phys.org
Hi,

it is not kinetic energy, it is potential energy. The same holds for any kind of bound system, nuclear, electromagnetic, gravitational.

Take the Moon-Earth system for instance. In principle, the mass of the bound system has less mass than the sum of the masses of the Earth and the Moon measured independantly of each other when far away apart in empty vacuum. Of course, one cannot actually perform such an experiment. But the mass defect merely comes from E=mc2 and the potential energy.
 
In the case of subatomic particles, what kind of potential energy is it?
 
Last edited:
For nucleons : The Strong Nuclear force (Residual color force)

For quarks: The Color force and EM force.

etc.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 28 ·
Replies
28
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 17 ·
Replies
17
Views
3K
  • · Replies 29 ·
Replies
29
Views
6K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 4 ·
Replies
4
Views
6K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
6
Views
2K