A system of physical chemistry - Index of

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A system of physical chemistry - Index of

DEBYES EQUATION 73

For the case in which x is small, t e. T is large (compared to $),

-J— — becomes ^^, and ^— — becomes — or simply 3. Hence,

Cj, 12

~- = -

-^ 3 = I, in other words, Dulong and Petit's Law holds at high

temperatures. On the other hand, when x is large, i.e. T is small, we

obtain by expanding I

or-

-|

^ the series ^{c^ + e-"^^ + e~^^ + .

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