Harmonic Potentials and energy state populations

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SUMMARY

The discussion focuses on determining the relationship between the force constants of two harmonic potentials, specifically kA and kB, to establish the conditions under which the higher energy state (minima B) becomes more probable than the lower energy state (minima A) at a given temperature T. The key conclusion is that kB must be significantly smaller than kA to favor the higher energy state in terms of energy state populations. This analysis is crucial for understanding the behavior of systems modeled by harmonic potentials in statistical mechanics.

PREREQUISITES
  • Understanding of harmonic potentials and their mathematical representation.
  • Familiarity with statistical mechanics principles, particularly energy state populations.
  • Knowledge of force constants and their role in potential energy surfaces.
  • Basic grasp of temperature effects on molecular states.
NEXT STEPS
  • Explore the mathematical derivation of energy state populations in harmonic potentials.
  • Study the implications of varying force constants in potential energy surfaces.
  • Investigate the role of temperature in statistical mechanics and its effect on state probabilities.
  • Learn about the applications of harmonic potentials in molecular dynamics simulations.
USEFUL FOR

Researchers in theoretical chemistry, physicists studying molecular interactions, and students exploring statistical mechanics and thermodynamics.

DanPhysChem
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Hi All - Let's say I have a potential energy surface with two minima, one higher than the other. We will label the higher minima B and the lower minima A. Each potential well can be approximated as a harmonic potential with force constants kA and kB for wells A and B respectively. How small must kB be in terms of kA in order for that state (higher energy) to be the more likely state at temperature T?
 
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Sry to bump my own thread. I'm really dying on this one here, any help is much appreciated.
 
Is anyone out there? I've yet to get a response to anything I've posted on this site :-(
 

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