Answered: 4. Show that the internal energy, U, of… | bartleby

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4. Show that the internal energy, U, of an Einstein crystal is given by:
3Nhv 3Nhv exp(-ßhv)
1- exp(-Bhv)
+
2
U =
Hint: The following identity will avoid you having to use the chain rule:
d |In(1-ef(x)) = −(ƒ '(x)) e²
dx
1-e

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Hence show that (u/beta)

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