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Table 4 The speeds of sound in Methane, Ethylene, Propylene and Propane 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

Hydrocarbon \(CH_{4}\) \(C_{2} H_{4}\) \(C_{3} H_{6}\) \(C_{3} H_{8}\)
\(\rho_{m} (mg/cc)\) 0.657 1.18 1.81 2.01
\(\sigma ({\rm A}^{ \circ } )\) 3.780 4.228 4.766 4.934
\(\varepsilon /k_{B} (K^{ \circ } )\) 1.31 1.84 2.34 2.33
\(M(g/mol)\) 16.04 28.05 42.08 44.10
\(v(m/s)\) 392.6560 296.1230 240.6070 234.6880