Index
DEFININGCONSTANTSYMBOL: k
- PID: si:definingconstantsymbol:k:2019
- Definition: The Boltzmann constant, e, is exactly 1.380 649 × 10-23 J/K.
- Source: SI Brochure 9th Ed. 2019, p 127
- Formatted:
1.380 649 x 10-23
- Numerical Value: 1.380649E-23
- Unit: J K-1
- Unit in Base SI: kg m2 s-1 K-1
- Notes
- This value was fixed by the CGPM in 2018 (Resolution 1), with effect from 20 May 2019.
- The Boltzmann constant is a proportionality constant between the quantities temperature (with unit kelvin) and energy (with unit joule).
- In statistical physics the Boltzmann constant connects the entropy S with the number Ω of quantum-mechanically accessible states: S = k ln Ω.
- Representations
- Text:
k
- HTML:
<em>k</em>
- Latex:
k
- Text:
- Related Definitions
- isConstantSymbolOf -> Boltzmann constant