Boltzmann's constant - Revision history

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	<onlyinclude>'''Boltzmann's constant''' (also referred to as the Boltzmann constant), written as ''k<sub>B</sub>'', is named after the physicist Ludwig Boltzmann.</onlyinclude> For a biography on Ludwig Boltzmann please see [http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Boltzmann.html here]. This constant should not be confused with ''σ'', the [[Stefan-Boltzmann constant]].		<onlyinclude>'''Boltzmann's constant''' (also referred to as the Boltzmann constant), written as ''k<sub>B</sub>'', is named after the physicist Ludwig Boltzmann.</onlyinclude> For a biography on Ludwig Boltzmann please see [http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Boltzmann.html here]. This constant should not be confused with ''σ'', the [[Stefan-Boltzmann constant]].

	The accepted value of the constant is:		The accepted value of the constant is:

	''k<sub>B</sub>'' = 1.38064 x 10<sup>-23</sup> [[joule\|J]] /[[kelvin\|K]] = 8.61733 x 10<sup>-5</sup> [[electron-volt\|eV]] /K		''k<sub>B</sub>'' = 1.38064 x 10<sup>-23</sup> [[joule\|J]] /[[kelvin\|K]] = 8.61733 x 10<sup>-5</sup> [[electron volt\|eV]] /K

	The units of [[energy]] divided by [[temperature]] give a conversion that allows us to talk about [[thermal energy]] in terms of temperature. In other words, a particular temperature corresponds to a particular energy for a small particle (see for example [[thermal neutron]]s).		The units of [[energy]] divided by [[temperature]] give a conversion that allows us to talk about [[thermal energy]] in terms of temperature. In other words, a particular temperature corresponds to a particular energy for a small particle (see for example [[thermal neutron]]s).

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[[Category:Done 2015-02-15]]
<onlyinclude>'''Boltzmann's constant''' (also referred to as the Boltzmann constant), written as ''kB'', is named after the physicist Ludwig Boltzmann.</onlyinclude> For a biography on Ludwig Boltzmann please see [http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Boltzmann.html here]. This constant should not be confused with ''σ'', the [[Stefan-Boltzmann constant]].

The accepted value of the constant is:

''kB'' = 1.38064 x 10-23 [[joule|J]] /[[kelvin|K]] = 8.61733 x 10-5 [[electron-volt|eV]] /K

The units of [[energy]] divided by [[temperature]] give a conversion that allows us to talk about [[thermal energy]] in terms of temperature. In other words, a particular temperature corresponds to a particular energy for a small particle (see for example [[thermal neutron]]s).

Boltzmann's constant is closely related to the [[ideal gas constant]] in that both are useful for the [[ideal gas law]] in determining the relationship among [[pressure]], [[volume]], and the number of [[molecule]]s of gas and the [[temperature]]. The difference is that the Boltzmann constant counts individual molecules rather than the number of [[mole]]s.

It's also useful in the equation for [[entropy]] (for a more mathematical explanation of entropy and the role of Boltzmann's constant please see [http://hyperphysics.phy-astr.gsu.edu/hbase/therm/entrop2.html#c1 hyperphysics]).

To learn more about Boltzmann's constant please see [http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html#c2 hyperphysics].
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