Heat Capacity

For users of the Mathcad browser: wmc-cv1.mcd (8 KB, ver. 5.0)

The heat capacity of solids is usually computed by the Dulong-Petit rule:

Cv = 3R

This expression gives acceptable values only at high temperatures. Debay has given a more general formula based on the vibrational modes of the crystal.
Some values for the Debay temperature are as follows:

NaKCu AgAuBe MgCaHg
159100315215180100029023096

In order to plot this function the temperature is defined as an array, for example from 10 to 400 K, with a step of 10 K. Then the heat capacity is computed for each temeprature.


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