# Statistical mechanics

1. Nov 2, 2009

### anon134

Consider an ideal gas of oxygen atoms in equilibrium with oxygen atoms absorbed on a planar surface. here are N_s sites per unit surface area at which the atoms can be absorbed, and the energy of an absorbed atom is -e compared to one in the free state. The system is under 1 atm and at 300K.

Should the atoms be described by classical statistics or quantum statistics? I need to show this qualitatively and here's what I have:

$$\frac{1}{e^{(\epsilon-\mu)/kT} \pm 1}$$
In the classical limit, [itex]\epsilon-\mu>>kT[/tex]

But we do not know what e is, or mu. Not sure where to go from here, any hints physics forums?

2. Nov 2, 2009