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Boltzmann constant

Boltzmann constant

A Dictionary of Astronomy | 1997 | Copyright

Boltzmann constant (symbol k or k_B) A constant that relates the kinetic energy of a particle in a gas to the temperature of that gas. It has the value 1.380 6504 × 10-23 joules per kelvin. The particles can be molecules, atoms, ions, or electrons. The Boltzmann constant relates pressure, p, and temperature, T, by the equation p = nkT, where n is the number of particles per unit volume. In astrophysics, this equation is of importance in understanding the interiors and surface layers of stars, and the atmosphere of planets. The constant is named after the Austrian physicist Ludwig Edward Boltzmann (1844–1906).
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Boltzmann constant

A Dictionary of Earth Sciences | 1999 | | Copyright

Boltzmann constant (k) The ratio of the ideal gas constant to the Avogadro constant: k = R/NA = 1.3805 × 10−23 J/K, where R is the ideal gas constant (equal to 8.3J/mol/K), and NA is the Avogadro constant.
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AILSA ALLABY and MICHAEL ALLABY. "Boltzmann constant." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Boltzmann constant." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O13-Boltzmannconstant.html

AILSA ALLABY and MICHAEL ALLABY. "Boltzmann constant." A Dictionary of Earth Sciences. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Boltzmannconstant.html

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