Boltzmann constant

For the constant pertaining to energy of black body radiation see Stefan–Boltzmann constant

Values of k	Units
Template:GapsTemplate:E	J K−1
Template:GapsTemplate:E	eV K−1
Template:GapsTemplate:E	erg K−1

The Boltzmann constant (k or k_B) is a physical constant. It is defined to be Template:Val J/K. 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 N_A:

$k=\frac{R}{N_{\mathrm{A}}}$

The Boltzmann constant has SI units of J⋅K⁻¹ (also written J/K), the same as entropy. It is named after the Austrian physicist Ludwig Boltzmann.

References

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