A system has four energy levels. The degeneracies of these energy levels are as follows: g0 = 3, g1 = 2, g2 = 1, g3 = 4.
a. For 20 gas molecules, at T = 0 K, how many molecules are in the first excited state?
b. For 20 gas molecules, how many molecules are in the first excited state at T = 8 K?
c. If ?0 = 100 J/mol and ?1 = 300 J/mol, what is the ratio of molecules in the first excited state compared to the ground state at T = 300 K?