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Gases - Speed of Sound

Speed of sound in gases

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The speed of sound depends on the density and the bulk modulus elasticity of a gas.

Speed of sound for some gases at 0oC and atmospheric pressure:

GasSpeed of Sound
(m/s)(ft/s)
Acetaldehyde 278 907
Acetylene 329 1073
Air 331 1086
Air, 20oC 343 1125
Ammonia (30oC) 440 1436
Argon 307.85 1005
Benzene (90oC) 200 653
Bromine (58oC) 149 486
Carbon dioxide (51oC) 280 913
Carbon disulfide (35oC) 206 672
Carbon monoxide 336 1096
Carbon tetrachloride (22oC) 133 434
Chloroform (22oC) 154 503
Cyclohexan (30oC) 181 591
Deuterium 888 2898
Diethyl ether (40oC) 187 610
Ethane (31oC) 316 1031
Ethylene (20oC) 327 1067
Fluorine (102oC) 332 1083
Trichlorofluoromethane R11 (18oC) 143 467
1,1,2-trichloro-1,2,2-trifluoroethane R113 (53oC) 124 405
Dichlorodifluoromethane R12 (17oC) 140 457
Chlorodifluoromethane R22 (17oC) 179 584
Helium 972 3171
Hydrogen 1290 4209
Hydrogen bromide 200 653
Hydrogen chloride 296 966
Hydrogen iodide 157 512
Hydrogen sulfide (24oC) 309 1008
Krypton (30oC) 224 731
Methane (41oC) 466 1521
Neon (30oC) 461 1504
Nitric oxide (16oC) 334 1090
Nitrogen (29oC) 354.4 1156
Nitrous oxide (25oC) 268 875
Oxygen 316 1031
Oxygen (30oC) 332.2 1083
Sulfur hexafluoride (11oC) 133 434
Water vapor (100oC) 477.5 1558
Water vapour 6 MPa (350oC) 571 1863
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