I'm so confused please help :\
Show that the contribution to the total energy from molar internal energy Um reverts to the classical expression at high T.
Classical: Um = 3NakT Quantum Um = 3NAhv/e^(hv/kT)-1
The Attempt at a Solution
Manipulating variables- E=hv
Quantum rearranging: hv/kT= ln(3Nahv)-ln(Um)
Very confused on what is meant by total energy though. Is that supposed to be E+Um?