Does heat transfer cause molecules to cool down?

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Discussion Overview

The discussion revolves around the concept of heat transfer, specifically focusing on whether molecules cool down after transferring heat during conduction. Participants explore the implications of energy conservation in a closed system and the effects of continuous heat supply on temperature distribution within an object.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether molecules at one end of an object become colder after transferring energy to nearby molecules during conduction, assuming no constant heat supply.
  • Another participant asserts that if no energy is added to the system and energy is conserved, the conclusion is that the molecules at the first end would indeed get colder.
  • Several participants agree on the conservation of energy, stating that energy, even as heat, is conserved.
  • There is a discussion about the temperature difference between two ends of an object when heat is continuously supplied, with one participant noting that the end in contact with the heat source would be at a higher temperature than the other end.
  • Participants clarify that as long as the heat source is at a higher temperature than the second end, the temperatures of the source and the first end would be close to each other.

Areas of Agreement / Disagreement

Participants generally agree on the principles of energy conservation and the effects of heat transfer, but the discussion includes nuances regarding temperature changes and the conditions under which these occur. No consensus is reached on the implications of these principles in all scenarios.

Contextual Notes

The discussion does not resolve the specifics of how temperature changes occur under varying conditions of heat supply and energy conservation, leaving some assumptions and dependencies on definitions unaddressed.

gracy
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One quick question about heat transfer.
during conduction heat transfer occur when molecules collide with each other .heat from one end of the object is transferred to other end .when molecules from end 1 collide with near by molecules of end 2 they transfer their energy to those nearby molecules.My question is after transferring energy do the molecules of end 1 get colder (provided that no constant supply of heat.)
 
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gracy said:
(provided that no constant supply of heat.)
If you're adding no energy to the system, and the energy of the system is conserved, the obvious conclusion is ... ?
 
Energy, even as heat, is conserved.
 
Yes.
 
Bystander said:
If you're adding no energy to the system, and the energy of the system is conserved, the obvious conclusion is ... ?
the molecules of end 1 get colder,right?
 
Yes.
 
Bystander said:
Yes.
And if heat is supplied continuously both ends would be hot but at any given instant end 1 which is in direct contact with heat source would be at higher temperature than end 2,right?
 
So long as the source is at a higher T than end 2.
 
Bystander said:
So long as the source is at a higher T than end 2.
you mean source and end 1 would be at same temperature?
 
  • #10
Or very close.
 
  • #11
Bystander said:
Or very close.
Thanks a lot for answering all my question.Can you please have a look at my thread moment of inertia ,this would be a great help.
 

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