Symbol k, units J/K (joules per kelvin), value 1·381 × 10?23 J/K, defined as R/NA, where R is the molar gas constant and NA is Avogadro's constant; appears throughout the study of the statistical properties of gases; named after Ludwig Boltzmann.
The Boltzmann constant (k or kB) is the physical constant relating temperature to energy.
It is named after the Austrian physicist Ludwig Boltzmann, who made important contributions to the theory of statistical mechanics, in which this constant plays a crucial role.
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