Talk:Dulong-Petit law
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dulong and petit's work were not perfect. infact, they had large errors on their specific heat calculations. LARGE errors. that is why dulong and petit died unhappy. and im sure you will too. with love <3 -emi To be fair the Dulong and Petit rule works remarkably well at oridianry temperatures e.g room temperature.. It is consistent with the Equipartiion of Energy Theroem. As early as 1819 Dulong and Petit discovered that the molat specific heat of solids at about 6 cal/mole.deg C. This can now be explaind by recognizing that the atom 0r molecule in a solid has 3 degrees of translational freedom and 3 degress of vibrational freedon ( 2 degees 0f freedom each for the X, Y, and Z axis). The Equipartion of Energy Theorem states that there is an average of 1/2 RT of energy per mole. i.e. 6(1.2) RT for the each mole of solid. The molar specific heat will then be 3R. R ia about 2 calories/mole. deg C. 3*2= 6. i.e., C= 6 cla/mole.deg C. That is remarkable. Let's try for it e.g. for Aluminium M= 27 grams/mole. C = 6/27 =0.22 Cal/gram. deg C. Which is fairly accurate.
[edit] "high T"
By itself the phrase "high temperatures" is meaningless. High compared to what? --Starwed 05:27, 25 September 2007 (UTC)
[edit] Chemical Law?
This law is to do with the vibrations of the atoms (as oscillators) in crystals and therefore to dub it as a chemical law is misleading. 71.103.51.35 (talk) 06:35, 28 February 2008 (UTC)Ur
