Imagine a system composed of many identical molecules, in which each molecule can adopt only one of two possible microstates. The upper and lower microstates of each molecule have energies ε1 and ε2, respectively, where the energy of the upper microstate is twice that of the lower microstate: ε2 = 2ε1 Give an expression for the temperature T needed to shift 1/4 of the molecules to the upper energy level.

Imagine a system composed of many identical molecules, in which each molecule can adopt only one of two possible microstates. The upper and lower microstates of each molecule have energies ε1 and ε2, respectively, where the energy of the upper microstate is twice that of the lower microstate: ε2 = 2ε1 Give an expression for the temperature T needed to shift 1/4 of the molecules to the upper energy level.