Dulong-Petit law (source code)

= Dulong-Petit law
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{wiki=Dulong–Petit_law}

In the classical high-temperature limit, each independent harmonic mode contributes $k_B$ to the constant-volume heat capacity.

A classical crystalline solid has three vibrational modes per atom, giving $C_V\simeq3Nk_B$, or $3R$ per mole.