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Table 3 The speeds of sound in noble gases at t = 25 °C from this work based on Eq. 7

From: Formula of compressibility and using it for air, noble gases, some hydrocarbons gases, some diatomic simple gases and some other fluids

Substance \(He\) \(Ne\) \(Ar\) \(Kr\) \(Xe\)
\(\rho_{m} (mg/cc)\) 0.1786 0.9002 1.7840 3.7490 5.8940
\(\sigma ({\rm A}^{ \circ } )\) 2.576 2.789 3.432 3.675 4.009
\(\varepsilon /k_{B} (K^{ \circ } )\) 10.2 35.7 122.4 170.0 234.7
\(M(g/mol)\) 4.0026 20.1797 39.7920 83.7980 131.2930
\(v(m/s)\) 787.4806 350.7260 249.5060 171.7220 136.8410