# A9: Second Virial Coefficients

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pc (MPa) Vcm cm3 mol−1 Tc(K) pcVcm RTc Coefficients of equations(3) TL (K) TU(K)
a b c
Ammonia 11.35 72.5 405.5 0.244 44.3 23.6 766.6 273 573
Argon 4.90 74.6 150.9 0.291 154.2 119.3 105.1 80 1024
Bromine 10.3 127 588 0.268 - - - - -
Carbon dioxide 7.38 94.0 304.1 0.274 137.6 87.7 325.7 220 1100
Carbon disulphide 7.9 173 552 0.298 211.0 167.1 538.7 280 430
Carbon monoxide 3.50 93.1 132.9 0.295 202.6 154.2 94.2 90 573
Chlorine 7.98 124 416.9 0.285 201.9 131.8 409.9 360 700
Cyanogen 6.0 - 400 - 746.9 508.2 238.0 308 423
Deuterium 1.65 60 38.2 0.312 155.1 132.5 18.9 18 423
Deuterium oxide 21.67 56.3 643.9 0.228 −16.8 3.37 1928.2 423 773
Dinitrogen oxide 7.25 97.4 309.6 0.274 180.7 114.8 305.4 200 423
Fluorine 5.22 66 144.3 0.288 71.4 48.0 165.0 80 300
Helium 0.227 57.2 5.19 0.301 114.1 98.7 3.245 7 150
Hydrogen 1.297 65.0 33.2 0.306 315.0 289.7 9.47 14 400
Hydrogen bromide 8.55 - 363.2 - - - - - -
Hydrogen chloride 8.31 81 324.7 0.249 57.7 37.8 495.9 190 480
Hydrogen cyanide 5.39 139 456.7 0.197 - - - - -
Hydrogen deuteride 1.48 63 36.0 0.312 - - - - -
Hydrogen fluoride 6.48 69 461 0.117 - - - - -
Hydrogen iodide 8.31 - 424 - - - - - -
Hydrogen sulphide 8.94 98.5 373.2 0.284 47.7 30.3 632.9 278 493
Iodine - 155 819 - - - - - -
Krypton 5.50 91.2 209.4 0.288 189.6 148.0 145.3 110 700
Mercury 172 42.7 1750 0.505 - - - - -
Neon 2.76 41.7 44.4 0.311 81.0 63.6 30.7 44 973
Nitrogen 3.39 89.5 126.2 0.289 185.4 141.8 88.7 75 700
Nitrogen dioxide 10.1 84 431 0.240 - - - - -
Nitrogen oxide 6.48 57.7 180 0.250 15.9 11.0 372.3 122 311
Oxygen 5.04 73.4 154.6 0.288 152.8 117.0 108.8 90 400
Ozone 5.57 88.9 261.1 0.228 - - - - -
Phosphine 6.5 - 324.5 - 248.6 164.9 276.4 190 297
Radon 6.3 - 377 - - - - - -
Silane 4.84 - 269.7 - - - - - -
Silicon tetrachloride 3.59 326 508.1 0.277 - - - - -
Silicon tetrafluoride 3.72 - 259.0 - 346.7 257.2 185.5 206 475
Sulfur 20.7 - 1314 - - - - - -
Sulfur dioxide 7.88 122 430.8 0.269 134.4 72.5 606.5 265 473
Sulfur hexafluoride 3.77 - 199 318.7 0.283 422.1 281.3 273.5 200
Sulfur trioxide 8.20 127 491.0 0.255 - - - - -
Tin (IV) chloride 3.75 351 591.9 0.267 - - - - -
Uranium hexafluoride 4.66 250 505.8 0.277 540.5 380.9 445.0 321 469
Water 22.06 56.0 647.1 0.229 33.0 15.2 1300.7 293 1248
Xenon 5.84 118 289.7 0.287 245.6 190.9 200.2 160 650
Organic compounds
Acetaldehyde - - 461 - −71.8 12.3 1351 288 476
Acetic acid 5.79 171 592.7 0.201 - - - - -
Acetone 4.70 209 508.1 0.232 - - - - -
Acetonitrile 4.85 173 545.5 0.185 - - - - -
Acetylene 6.14 113 308.3 0.270 49.2 42.9 354.9 200 273
Aniline 5.31 287 699 0.262 - - - - -
Benzene 4.90 256 562.0 0.268 571.4 348.4 526.6 290 600
Bromobenzene 4.52 324 670 0.263 - - - - -
Bromoethane 6.23 215 503.9 0.320 - - - - -
Bromomethane - - 464 - 51.1 42.4 792.2 244 383
(R13B1) 3.97 196 340.2 0.275 - - - - -
Buta-1,3-diene 4.33 221 425 0.270 - - - - -
Butane 3.80 255 425.1 0.274 165.4 135.4 555 250 400
Butanone 4.21 267 536.8 0.252 948.6 314.6 702.4 315 371
But-1-ene 4.02 240 419.6 0.277 522.9 289.6 421.2 243 420
cis-But-2-ene 4.20 234 435.6 0.271 1369.5 778.2 297.4 251 343
trans-But-2-ene 3.98 238 428.6 0.266 1245.0 763.3 284.3 243 333
Carbon tetrachloride 4.56 276 556.4 0.272 607.6 463.0 461.0 316 419
(R14) 3.74 140 227.6 0.276 256.32 172.80 206.0 175 625
Chlorobenzene 4.52 308 632.4 0.265 - - - - -
Chlorodifluoromethane - - - - - - - - -
(R22) 4.99 169 369.3 0.274 374.7 270.2 287.8 298 473
Chloroethane 5.30 - 460.4 - 182.4 88.4 717.9 273 605
Chloroform 5.47 239 536.4 0.293 485.7 272.5 542.7 316 400
Chloromethane 6.68 139 416.2 0.268 396.7 259.2 337.3 280 600
Chlorotrifluoromethane - - - - - - - - -
Cyclohexane 4.07 308 553.5 0.273 677.3 393.2 531.4 300 560
Cyclopentane 4.51 260 511.7 0.275 - - - - -
Cyclopropane 5.58 162 398.3 0.274 355.7 255.2 316.7 303 403
Diethylamine 3.71 301 496.6 0.270 673.0 378.0 517.7 314 405
Diethyl ether 3.64 280 466.7 0.262 968.3 346.6 552.3 280 400
Dimethylamine 5.34 - 437.2 - 407.7 234.2 456.0 312 405
Dimethyl ether 5.37 190 400.0 0.307 371.0 267.4 351.3 273 328
2,2-Dimethylpropane 3.20 311 433.8 0.276 407.0 281.0 450 250 440
1,4-Dioxan 5.21 238 587 0.254 - - - - -
Ethane 4.87 146 305.3 0.279 267.3 191.5 256 210 500
Ethanol 6.14 168 514.0 0.241 864.6 45.4 1345 313 399
Ethyl acetate 3.83 286 523.2 0.252 982.9 407.5 598.1 330 399
Ethylamine 5.62 182 456 0.270 533.6 289.0 452.3 293 405
Ethylene 5.03 130 282.3 0.280 278.9 193.5 231.2 181 448
Ethyl formate 4.74 229 508.5 0.257 763.9 341.0 542.6 323 395
Ethyl methyl ether 4.40 221 437.8 0.267 - - - - -
Fluorobenzene 4.55 269 560.1 0.263 613.0 360.0 555.4 318 623
Fluoromethane 5.88 113 317.8 0.252 269.2 172.8 303.0 273 423
Heptane 2.74 428 540.2 0.261 982.0 523.9 582.3 300 700
Hept-1-ene - - 537.3 - 1245.0 635.1 530.9 334 411
Hexane 3.02 368 507.6 0.264 839.6 404.1 572.6 300 450
Hex-1-ene - - 504.0 - 836.6 460.4 507.1 313 410
Iodobenzene 4.52 351 721 0.265 - - - - -
Iodomethane - - 528 - 459.8 248.0 476.0 313 383
Isobutane 3.64 259 407.8 0.278 270.3 192.1 460 250 440
Methane 4.60 98.6 190.6 0.286 206.4 159.5 133.0 110 600
Methanol 8.08 117 512.5 0.223 14 3.958 1840 280 400
Methyl acetate 4.69 228 506.8 0.254 762.9 336.7 577.9 323 391
Methylamine 7.61 - 430.7 - 85.3 57.1 685.9 293 550
2-Methylbutane 3.38 306 460.4 0.270 952.1 620.4 355.8 280 450
Methylcyclohexane 3.47 368 572.2 0.268 - - - - -
Methylcyclopentane 3.78 319 532.7 0.272 - - - - -
Methyl formate 6.00 172 487.2 0.255 581.0 269.3 525.5 319 397
2-Methylpentane 3.04 368 497.7 0.270 - - - - -
2-Methylpropene 4.00 239 417.9 0.275 722.1 354.4 405.8 243 333
Naphthalene 4.05 407 748.5 0.269 - - - - -
Octafluorocyclobutane 2.78 324 388.5 0.279 895.7 616.4 285.6 373 623
Octane 2.49 492 568.7 0.259 1138.0 536.1 672.5 300 700
Oct-1-ene - - 566.7 - 1328.0 631.5 614.2 359 412
Pentane 3.37 311 469.7 0.268 377.9 237.6 560 270 500
Pent-1-ene 3.53 - 464.8 - 655.7 344.2 499.9 294 410
Phenol 6.1 - 694.2 - - - - - -
Propadiene - - 393 - 391.4 272.0 310.5 223 353
Propane 4.25 200 369.8 0.281 322.8 220.3 350 240 330
Propan-1-ol 5.17 218 536.8 0.252 861.9 297.3 669.2 378 423
Propene 4.60 181 364.8 0.274 286.6 197.0 349 220 400
Propyne 5.63 164 402.4 0.275 444.6 314.6 292.2 348 473
Pyridine 5.63 254 620.0 0.277 796.1 398.8 576.3 347 438
Tetramethylsilane 2.82 362 448.6 0.273 792.2 502.2 403.4 295 539
Toluene 4.11 316 591.8 0.264 719.1 373.3 646.4 341 583
Triethylamine 3.03 389 535.6 0.265 1261.6 739.1 442.1 323 405
Trimethylamine 4.09 254 432.8 0.288 747.0 466.5 347.3 298 375
2,2,4-Trimethylpentane 2.57 468 544.0 0.266 - - - - -
m-Xylene 3.54 375 617.0 0.259 - - - - -
o-Xylene 3.73 370 630.3 0.263 - - - - -
p-Xylene 3.51 378 616.2 0.259 - - - - -

A9: Second Virial Coefficients is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.