An expansion of entropy is regularly expressed to be comparable to an increment of turmoil or arbitrariness or blended upness or likelihood when these are basically shorthand for the number of available eigenstates (energy) for a secluded framework. The quantity of eigenstates is straightforwardly connected with the idea of "blended upness" in two exceptional cases which serve to outline the applied relationship. In the first place, we guess we have two noninteracting gases each in a disconnected holder and isolated from one another by an impermeable layer. At the point when the film is broken, an expanded volume is accessible for every atom and moreover, the quantity of accessible mixes of translational energy eigenvalues increment, which we have seen makes up its energy. What is the relationship?