Question

At very low temperatures, the heat capacity Cv
of a solid is:​

Answer 1

Explanation:

Indeed at room temperature, most metals and simple crystalline solids have a molar heat capacity of about 3R.

(This is sometimes referred to as “Dulong and Petit's Rule”.) At low temperatures, however, the molar heat falls below this value, and eventually approaches zero at 0 K.

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Answer 2

Answer:

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