Atoms and Heat: How Temperature Affects Motion

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Discussion Overview

The discussion centers on the relationship between temperature and atomic motion, exploring how heat affects the movement of atoms and subatomic particles. It includes questions about the nature of atomic movement, the randomness of direction, and the behavior of individual particles like protons, neutrons, and electrons in response to heat.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why atoms move faster at higher temperatures and whether applying heat to a stationary atom would initiate movement, including the direction of that movement.
  • Another participant asserts that atoms cannot be completely stationary except at absolute zero and explains that temperature is defined in relation to the average kinetic energy of particles.
  • Questions are raised about the randomness of atomic movement and whether atoms simply bounce off each other.
  • It is suggested that according to Kinetic Molecular Theory, the direction of atomic movement is random.
  • Clarification is provided that while atoms move due to kinetic energy, protons and neutrons remain fixed in the nucleus, with electrons orbiting around it.
  • A participant inquires about the movement of individual particles like protons and neutrons when not part of an atom and whether they are affected by heat.

Areas of Agreement / Disagreement

Participants express differing views on the nature of atomic movement and the effects of heat on individual particles, indicating that multiple competing perspectives remain without consensus.

Contextual Notes

Some statements rely on assumptions about the definitions of temperature and heat, and the discussion does not resolve the complexities of atomic and subatomic behavior under varying thermal conditions.

ComputerPsi
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Why do atoms move faster in a higher temperature?
If an atom was initially not moving at all, and then heat was applied to it, would it start moving? If so, what direction will it move in?
 
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It is not possible for an atom to not be moving at all, except at absolute zero, which is unobtainable.

Atoms move faster at higher temperatures because that is how we define temperature. Temperature is related to the average kinetic energy of particles in a substance. The higher their kinetic energy (the faster they are moving), the faster will be the measurement of the thermometer.

"Heat" and "temperature" are statistical concepts which apply to large collections of atoms simultaneously. It is not very sensible to describe a single atom as having a temperature; nor is it sensible to talk about applying heat to one single atom.

- Warren
 
OK... Thats understood, but it raises 2 questions.
1. What direction do the atoms go? Or do they just bounce off other atoms?
2. Do only the atoms move around from kinetic energy, or do individual particles like protons, nutrons, and electrons move also?
 
ComputerPsi said:
OK... Thats understood, but it raises 2 questions.
1. What direction do the atoms go? Or do they just bounce off other atoms?
2. Do only the atoms move around from kinetic energy, or do individual particles like protons, nutrons, and electrons move also?

1) The direction of the atoms are completely random according to the Kinetic Molecular Theory.

2) Only the atoms move, the protons and neutrons are fixed in the atom as being the nucleus with electrons "rotating" around the nucleus. If the atoms move fast enough, some atoms will get ionized (they will lose 1, some, or all electrons).
 
ArmoSkater87 said:
Only the atoms move, the protons and neutrons are fixed in the atom as being the nucleus with electrons "rotating" around the nucleus. If the atoms move fast enough, some atoms will get ionized (they will lose 1, some, or all electrons).

No, I mean if the particles are not in an atom.. Individually floating around. Would they move from heat, or only atoms affected by it?

Btw, thanks for the replies. It answers a couple of questions. :smile:
 

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