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The Boltzmann equation is giving the residual entropy of the system. Entropy is the amount of "disorder" and the Boltzmann equation is sort of giving a statistical answer of all the possible orientations and positions of all the molecules in the system.
The Boltzmann Equation gives a relationship between entropy S and degeneracy W. Degeneracy describes all the possible microstates (i.e. positions) that might be occupied by the molecules of a system. They're related because entropy is the tendency towards disorder, and degeneracy describes all the ways in which the elements of a system might be distributed. You'll be given the Boltzmann constant k(B) and probably the number of states. You'll then calculate entropy using S = k(B).ln W
The Boltzmann equation strictly talks about the residual entropy that is relating to degeneracy in disorder. The W represents the amount of micro states raise to the power of the number of particles. The Kb is the Boltzmann constant
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