Scientific

बोल्ट्ज़मान स्थिरांक

परिभाषा

एक मौलिक भौतिक स्थिरांक जिसका सटीक मान 1.380649 × 10⁻²³ J/K है, जो कणों की औसत तापीय गतिज ऊर्जा को परम ताप से संबंधित करता है।

व्याख्या

The average kinetic energy of a gas molecule is (3/2)k₂T: at room temperature (293 K), this is 6.07 × 10⁻²¹ J = 0.038 eV per molecule. Since 2019, the kelvin is defined by fixing k₂ to exactly 1.380649 × 10⁻²³ J/K. The Boltzmann constant also appears in entropy (S = k₂ ln W) and the ideal gas law, connecting thermodynamics to statistical mechanics.

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