Avogadro constant: Difference between revisions
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The '''Avogadro constant''' (<math> N_A</math>) in [http://physics.nist.gov/cuu/Units/ Le Système international d'unités] is given by: | The '''Avogadro constant''' (<math> N_A</math>) in [http://physics.nist.gov/cuu/Units/ Le Système international d'unités] is given by (Ref. 1): | ||
:N<sub>A</sub> = 6.02214179(30) x 10<sup>23</sup> mol<sup>-1</sup> | :N<sub>A</sub> = 6.02214179(30) x 10<sup>23</sup> mol<sup>-1</sup> | ||
==History== | |||
The first person to try elucidate an analogous value was [[ Johann Josef Loschmidt]] in 1866 (Ref. 2). | |||
However, this constant was named after Lorenzo Romano Amedeo Carlo Avogadro by Jean Perrin in 1909 (Ref. 3). | |||
==Interesting reading== | ==Interesting reading== | ||
*[http://dx.doi.org/10.1038/179145a0 F. A. Paneth "Avogadro's Number and Loschmidt's Number", Nature '''179''' p. 145 (1957)] | |||
*[http://dx.doi.org/10.1119/1.2188962 Ronald Newburgh, Joseph Peidle and Wolfgang Rueckner "Einstein, Perrin, and the reality of atoms: 1905 revisited", American Journal of Physics '''74''' pp. 478-481 (2006)] | *[http://dx.doi.org/10.1119/1.2188962 Ronald Newburgh, Joseph Peidle and Wolfgang Rueckner "Einstein, Perrin, and the reality of atoms: 1905 revisited", American Journal of Physics '''74''' pp. 478-481 (2006)] | ||
==References== | ==References== | ||
#[http://physics.nist.gov/cgi-bin/cuu/Value?na#mid CODATA] | #[http://physics.nist.gov/cgi-bin/cuu/Value?na#mid CODATA] | ||
#J. Loschmidt "Zur Grösse der Luftmolecüle", Sitzungsberichte der kaiserlichen Akademie der Wissenschaften zu Wien: Math-Naturwiss., Klasse 2, '''52''' pp. 395–413 (1866) | |||
#Jean Perrin "Mouvement brownien et réalité moléculaire", Annales de chimie et de physique '''XVIII''' (8e série) pp. 5-113 (1909) [http://gallica.bnf.fr/ark:/12148/bpt6k349481/ Page images on Gallica] | |||
#[http://dx.doi.org/10.1007/BF02743188 G. Mana and G. Zosi "The Avogadro constant", La Rivista del Nuovo Cimento '''18''' pp. 1-23 (1995)] | #[http://dx.doi.org/10.1007/BF02743188 G. Mana and G. Zosi "The Avogadro constant", La Rivista del Nuovo Cimento '''18''' pp. 1-23 (1995)] | ||
[[Category: Physical constants]] | [[Category: Physical constants]] | ||
Revision as of 15:24, 30 July 2008
The Avogadro constant () in Le Système international d'unités is given by (Ref. 1):
- NA = 6.02214179(30) x 1023 mol-1
History
The first person to try elucidate an analogous value was Johann Josef Loschmidt in 1866 (Ref. 2). However, this constant was named after Lorenzo Romano Amedeo Carlo Avogadro by Jean Perrin in 1909 (Ref. 3).
Interesting reading
- F. A. Paneth "Avogadro's Number and Loschmidt's Number", Nature 179 p. 145 (1957)
- Ronald Newburgh, Joseph Peidle and Wolfgang Rueckner "Einstein, Perrin, and the reality of atoms: 1905 revisited", American Journal of Physics 74 pp. 478-481 (2006)
References
- CODATA
- J. Loschmidt "Zur Grösse der Luftmolecüle", Sitzungsberichte der kaiserlichen Akademie der Wissenschaften zu Wien: Math-Naturwiss., Klasse 2, 52 pp. 395–413 (1866)
- Jean Perrin "Mouvement brownien et réalité moléculaire", Annales de chimie et de physique XVIII (8e série) pp. 5-113 (1909) Page images on Gallica
- G. Mana and G. Zosi "The Avogadro constant", La Rivista del Nuovo Cimento 18 pp. 1-23 (1995)