Boltzmann Constant

Key Stage 5

Meaning

The Boltzmann constant is the molar gas constant divided by the Avogadro constant.

About the Boltzmann Constant

• The Boltzmann constant denoted by the symbol 𝑘 or 𝑘_B
• The Boltzmann constant has a value of 1.38×10⁻²³ J/K.
• Relates the average kinetic energy of particles in a gas with the temperature.
• Fundamental in the statistical description of physical systems.

Examples

• Used in the ideal gas law: 𝑃𝑉=𝑁𝑘𝑇
• Important in the study of thermodynamics and statistical mechanics.