Encyclopedia > Dulong-Petit law

  Article Content

Dulong-Petit law

Dulong-Petit law, found in 1819 by Pierre Louis Dulong and Alexis Thérèse Petit, states the classical expression for the specific heat capacity of a crystal due to its lattice vibrations[?]. The result is extremely simple: regardless of the nature of the crystal, the specific heat capacity is equal to 3R/M, where R is the gas constant and M is the molar mass. Despite its simplicity, Dulong-Petit law offers fairly good prediction for the specific heat capacity of solids with relatively simple crystal structure at high temperatures. It fails, however, in the low temperature region, where Debye model[?] should be used instead.

See also: Stefan-Boltzmann law



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Jordanes

... was a 6th century historian. He was an Ostrogoth and was a notary of Gothic kings in Italy. At the time of Justinian, he was a Christian and possibly bishop of Croton. In ...

 
 
 
This page was created in 28.2 ms