System of particles with non-degenerate energy levels

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SUMMARY

The discussion focuses on calculating the entropy of a system with three non-degenerate energy levels (0, ε, and 2ε) populated by distinguishable particles. For two particles with a total energy of U=2ε, the multiplicity (ω) is calculated as 2. In contrast, for three particles with the same total energy, the multiplicity increases to 3. The entropy is derived using the formula S = kBln(ω), emphasizing the significance of non-degenerate energy levels in determining the system's multiplicity and entropy.

PREREQUISITES
  • Understanding of statistical mechanics concepts
  • Familiarity with the entropy formula S = kBln(ω)
  • Knowledge of distinguishable versus indistinguishable particles
  • Basic principles of energy levels in quantum mechanics
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  • Study the implications of degeneracy in energy levels
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Students and professionals in physics, particularly those studying statistical mechanics and thermodynamics, as well as anyone interested in the behavior of systems with non-degenerate energy levels.

Elvis 123456789
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Homework Statement


A system has three non-degenerate energy levels with energies 0, ε, and 2ε.

a) Calculate the entropy of the system if the three levels are populated by two distinguishable particles such that the total energy is U=2ε.

b) Calculate the entropy of the system if the three levels are populated by three distinguishable particles such that the total energy is U=2ε.

Homework Equations


S = kBln(ω)

The Attempt at a Solution


my main question for this problem is the meaning of non-degenerate energy levels. I understand it to mean that the energy levels are at most occupied by 1 particle. So for part a.) ω = 2 and that would be ω = 3 if the energy levels were to be degenerate. Is this correct?
 
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Elvis 123456789 said:
I understand it to mean that the energy levels are at most occupied by 1 particle.
No, it means that a particle that has an energy, e.g., ε can only be in one state. If the levels were doubly degenerate, then the same particle could be in one of two levels with that energy. That of course will change the multiplicity.
 

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