Boltzmann constant

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
For the constant pertaining to energy of black body radiation see Stefan–Boltzmann constant
Values of k[1] Units
1.3806488(13)×10−23 JK−1
8.6173324(78)×10−5 eV K−1
1.3806488(13)×10−16 erg K−1

The Boltzmann constant (k or kB) is a physical constant. It relates the average kinetic energy of a particle in a gas with the temperature of the gas. It is the gas constant R divided by the Avogadro constant NA:

The Boltzmann constant has SI units of JK−1, the same as entropy. It is named after the Austrian physicist Ludwig Boltzmann.

References[change | change source]

  1. P.J. Mohr, B.N. Taylor, and D.B. Newell (2011), "The 2010 CODATA Recommended Values of the Fundamental Physical Constants" (Web Version 6.0). This database was developed by J. Baker, M. Douma, and S. Kotochigova. Available: [Thursday, 02-Jun-2011 21:00:12 EDT]. National Institute of Standards and Technology, Gaithersburg, MD 20899. Archived 21 February 2012 at WebCite