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Table 9 The speeds of sound in Nitrous oxide, Carbon dioxide, Nitric oxide, Carbon monoxide, Sulphur dioxide and Dichlorodifluoromethane 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 \(N_{2} O\) \(CO_{2}\) \(NO\) \(CO\) \(SO_{2}\) \(CCl_{2} F_{2}\)
\(\rho_{m} (mg/cc)\) 1.8088 1.8079 1.3402 1.1453 2.6642 2.0383
\(\sigma ({\rm A}^{ \circ } )\) 3.879 3.996 3.470 3.590 4.026 5.116
\(\varepsilon /k_{B} (K^{ \circ } )\) 220.0 190.0 119.0 110.0 363.0 280.0
\(M(g/mol)\) 44.0128 44.0095 30.0061 28.0101 64.0640 120.9140
\(v(m/s)\) 236.6072 236.7511 287.3415 297.4551 195.2006 142.5648