Why do molecules vibrate under higher temperatures?

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    Molecules
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Discussion Overview

The discussion centers around the reasons why molecules vibrate more at higher temperatures, exploring concepts related to kinetic energy, molecular movement, and the effects of temperature on molecular behavior. The scope includes theoretical explanations and conceptual clarifications regarding molecular dynamics.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant suggests that increased vibration is due to faster movement of electrons, which in turn affects atomic movement.
  • Another participant states that heating molecules causes them to move faster, leading to increased vibration.
  • A third participant notes that kinetic energy is defined as heat, questioning the necessity of asking why molecules move more when heated.
  • There is a query about the distinction between translational kinetic energy and vibrational kinetic energy.
  • One participant argues that higher temperatures allow molecules to move faster due to expanded space, drawing an analogy to human behavior in different temperatures.
  • Another participant emphasizes that as energy increases, both vibrations and linear movements increase in amplitude, affecting pressure and expansion of the object or gas.

Areas of Agreement / Disagreement

Participants express various viewpoints on the mechanisms behind molecular vibration at higher temperatures, with no consensus reached on the explanations or definitions involved.

Contextual Notes

Some statements rely on assumptions about definitions of kinetic energy and temperature, and the discussion does not resolve the distinctions between types of kinetic energy.

LogicalAcid
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This question has been bugging me for a while, I thought that it was due to the atoms electrons moving faster, making the atom basically also move around more.
 
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Molecules are always moving and when you heat them up they move faster causing vibration.
 
Atomic / molecular kinetic energy is heat by definition so it's kind of meaningless to ask why atoms / molecules move more when hot.
 
Is this a question about the difference between translational kinetic energy and vibrational KE?
 
Molecules tebd to move faster unter higher temeratures because space expands and teher is more room for them to flow, when it gets colder and temperatures drop, the molecules move slower and bcome more copact. Just think about yourself, its easier to move around and do things when your warm, but when your colder, you huddle and try not to move
 
You are confusing the order of things here. As the energy in the system increases the vibrations and linear movements increase in amplitude. This increases the pressure on the walls / outside of the 'object' ( or gas) and, if the applied pressure is not maintained, the object will expand until there is, again, a balance.
The temperature is, by definition, the average kinetic energy of the particles.
 

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