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Temperature and kinetic energy

Therefore, the kinetic energy per kelvin of one mole of monatomic ideal gas (D = 3) is K = D 2 k B N A = 3 2 R, {\displaystyle K={\frac {D}{2}}k_{\text{B}}N_{\text{A}}={\frac {3}{2}}R,} where N A {\displaystyle N_{\text{A}}} is the Avogadro constant, and R is the ideal gas constant.