The model holds particle mass, count and container volume constant while varying absolute temperature. Ideal-gas kinetic theory connects average translational kinetic energy with temperature and predicts a square-root dependence of characteristic speed. Collisions are represented schematically rather than integrated as a molecular-dynamics simulation. Phase transitions and changes in molecular internal energy are outside this comparison.
Matter and chemistry · Discover & try
What changes when particles are heated?
Reading level 5 of 5 · AdvancedChange
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temperature
A measure related to particles’ average kinetic energy.
heat
Energy transfer caused by a temperature difference.
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Idealised fixed-volume gas; motion is slowed and no actual heating experiment is required.
What to look for
- Count stays fixed
- A range of speeds remains
- Cooling reduces average motion
Explain what you noticed
A sealed sample is cooled without losing material. Which change fits this model?
Keep this idea: Compare average motion without inventing extra particles.
Follow the sources
- American Chemical Society — Molecules in Motion
- American Chemical Society — Heat, Temperature, and Conduction
Source material checked 2026-10-28. Explanations and activities by Nepedia. Source links do not imply endorsement.
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