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plonker

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## Homework Statement

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.

## Homework Equations

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?

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