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fast facts provides physical properties such as molecular weight, critical temperature and pressure, liquid and gas density, and specific gravity. select gas below
acetylene
| formula | c₂h₂ |
| molecular weight (lb/mol) | 26.04 |
| critical temp. (°f) | 96.0 |
| critical pressure (psia) | 906.0 |
| boiling point (°f) | –119.6 |
| melting point (°f) | –113.4 |
| psat @ 70°f (psia) | 586.2 |
| liquid density @ 70°f (lb/ft³) | 23.61 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0677 |
| specific volume @ 70°f 1 atm (lb/ft³) | 14.76 |
| specific gravity | 0.920 |
| specific heat @ 70°f (btu/lbmol-°f) | 10.53 |
air
| formula | -- |
| molecular weight (lb/mol) | 28.96 |
| critical temp. (°f) | n/a |
| critical pressure (psia) | n/a |
| boiling point (°f) | –317.8 |
| melting point (°f) | n/a |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.075 |
| specific volume @ 70°f 1 atm (lb/ft³) | 13.3 |
| specific gravity | 1.000 |
| specific heat @ 70°f (btu/lbmol-°f) | 6.96 |
notes
notes:
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
ammonia
| formula | nh₃ |
| molecular weight (lb/mol) | 17.03 |
| critical temp. (°f) | 270.1 |
| critical pressure (psia) | 1636.0 |
| boiling point (°f) | -28.2 |
| melting point (°f) | –107.9 |
| psat @ 70°f (psia) | 129.0 |
| liquid density @ 70°f (lb/ft³) | 38.55 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0445 |
| specific volume @ 70°f 1 atm (lb/ft³) | 22.48 |
| specific gravity | 0.604 |
| specific heat @ 70°f (btu/lbmol-°f) | 8.69 |
argon (ar)
| formula | ar |
| molecular weight (lb/mol) | 39.95 |
| critical temp. (°f) | –188.4 |
| critical pressure (psia) | 705.8 |
| boiling point (°f) | –302.6 |
| melting point (°f) | –308.8 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1034 |
| specific volume @ 70°f 1 atm (lb/ft³) | 9.67 |
| specific gravity | 1.38 |
| specific heat @ 70°f (btu/lbmol-°f) | 4.98 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
arsine
| formula | ash₃ |
| molecular weight (lb/mol) | 77.95 |
| critical temp. (°f) | 211.8 |
| critical pressure (psia) | 957 |
| boiling point (°f) | –79.9 |
| melting point (°f) | –178.5 |
| psat @ 70°f (psia) | 217.9 |
| liquid density @ 70°f (lb/ft³) | 92.59 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.2038 |
| specific volume @ 70°f 1 atm (lb/ft³) | 4.91 |
| specific gravity | 2.769 |
| specific heat @ 70°f (btu/lbmol-°f) | 9.23 |
boron trichloride
| formula | bcl₃ |
| molecular weight (lb/mol) | 117.17 |
| critical temp. (°f) | 353.8 |
| critical pressure (psia) | 561.3 |
| boiling point (°f) | 54.6 |
| melting point (°f) | –160.6 |
| psat @ 70°f (psia) | 19.9 |
| liquid density @ 70°f (lb/ft³) | 84.44 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.3141 |
| specific volume @ 70°f 1 atm (lb/ft³) | 3.18 |
| specific gravity | 4.267 |
| specific heat @ 70°f (btu/lbmol-°f) | 15.11 |
boron trifluoride
| formula | bf₃ |
| molecular weight (lb/mol) | 67.81 |
| critical temp. (°f) | 10.0 |
| critical pressure (psia) | 723.0 |
| boiling point (°f) | –148.5 |
| melting point (°f) | –199.7 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1745 |
| specific volume @ 70°f 1 atm (lb/ft³) | 5.73 |
| specific gravity | 2.320 |
| specific heat @ 70°f (btu/lbmol-°f) | 12.10 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
butane
| formula | c₄h₁₀ |
| molecular weight (lb/mol) | 58.12 |
| critical temp. (°f) | 305.9 |
| critical pressure (psia) | 549.9 |
| boiling point (°f) | 31.0 |
| melting point (°f) | —217.0 |
| psat @ 70°f (psia) | 31.3 |
| liquid density @ 70°f (lb/ft³) | 36.05 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1551 |
| specific volume @ 70°f 1 atm (lb/ft³) | 6.45 |
| specific gravity | 2.108 |
| specific heat @ 70°f (btu/lbmol-°f) | 23.87 |
carbon dioxide (co2)
| formula | co₂ |
| molecular weight (lb/mol) | 44.01 |
| critical temp. (°f) | 87.9 |
| critical pressure (psia) | 1071.0 |
| boiling point (°f) | –109.2 |
| melting point (°f) | –69.9 |
| psat @ 70°f (psia) | 852.8 |
| liquid density @ 70°f (lb/ft³) | 47.64 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1144 |
| specific volume @ 70°f 1 atm (lb/ft³) | 8.74 |
| specific gravity | 1.555 |
| specific heat @ 70°f (btu/lbmol-°f) | 8.92 |
carbon monoxide
| formula | co |
| molecular weight (lb/mol) | 28.01 |
| critical temp. (°f) | –220.4 |
| critical pressure (psia) | 485.6 |
| boiling point (°f) | –312.7 |
| melting point (°f) | –337.1 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0725 |
| specific volume @ 70°f 1 atm (lb/ft³) | 13.80 |
| specific gravity | 0.985 |
| specific heat @ 70°f (btu/lbmol-°f) | 6.97 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
chlorine
| formula | cl₂ |
| molecular weight (lb/mol) | 70.91 |
| critical temp. (°f) | 291.2 |
| critical pressure (psia) | 1118.4 |
| boiling point (°f) | –29.3 |
| melting point (°f) | –149.8 |
| psat @ 70°f (psia) | 98.4 |
| liquid density @ 70°f (lb/ft³) | 88.83 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1858 |
| specific volume @ 70°f 1 atm (lb/ft³) | 5.38 |
| specific gravity | 2.524 |
| specific heat @ 70°f (btu/lbmol-°f) | 8.16 |
deuterium
| formula | d₂ |
| molecular weight (lb/mol) | 4.03 |
| critical temp. (°f) | –390.8 |
| critical pressure (psia) | 241.5 |
| boiling point (°f) | –417.0 |
| melting point (°f) | –426.0 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0104 |
| specific volume @ 70°f 1 atm (lb/ft³) | 95.97 |
| specific gravity | 0.142 |
| specific heat @ 70°f (btu/lbmol-°f) | 6.95 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
diborane
| formula | b₂h₆ |
| molecular weight (lb/mol) | 27.67 |
| critical temp. (°f) | 62.1 |
| critical pressure (psia) | 580.8 |
| boiling point (°f) | –135.1 |
| melting point (°f) | –264.8 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0712 |
| specific volume @ 70°f 1 atm (lb/ft³) | 14.05 |
| specific gravity | 0.950 |
| specific heat @ 70°f (btu/lbmol-°f) | 13.67 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
dichlorosilane
| formula | sih₂cl₂ |
| molecular weight (lb/mol) | 101.01 |
| critical temp. (°f) | 348.8 |
| critical pressure (psia) | 678.2 |
| boiling point (°f) | 49.9 |
| melting point (°f) | –187.6 |
| psat @ 70°f (psia) | 24.2 |
| liquid density @ 70°f (lb/ft³) | 75.19 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.2602 |
| specific volume @ 70°f 1 atm (lb/ft³) | 3.84 |
| specific gravity | 3.470 |
| specific heat @ 70°f (btu/lbmol-°f) | 14.74 |
disilane
| formula | si₂h₆ |
| molecular weight (lb/mol) | 62.22 |
| critical temp. (°f) | 303.5 |
| critical pressure (psia) | 746.9 |
| boiling point (°f) | 6.3 |
| melting point (°f) | –206.7 |
| psat @ 70°f (psia) | 49.3 |
| liquid density @ 70°f (lb/ft³) | n/a |
| gas density @ 70°f 1 atm (lb/ft³) | n/a |
| specific volume @ 70°f 1 atm (lb/ft³) | n/a |
| specific gravity | n/a |
| specific heat @ 70°f (btu/lbmol-°f) | n/a |
ethane
| formula | c₂h₆ |
| molecular weight (lb/mol) | 30.07 |
| critical temp. (°f) | 90.4 |
| critical pressure (psia) | 707.9 |
| boiling point (°f) | –127.5 |
| melting point (°f) | –297.9 |
| psat @ 70°f (psia) | 559.6 |
| liquid density @ 70°f (lb/ft³) | 20.98 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0784 |
| specific volume @ 70°f 1 atm (lb/ft³) | 12.76 |
| specific gravity | 1.065 |
| specific heat @ 70°f (btu/lbmol-°f) | 12.67 |
ethyl chloride
| formula | c₂h₅cl |
| molecular weight (lb/mol) | 64.52 |
| critical temp. (°f) | 369.0 |
| critical pressure (psia) | 764.2 |
| boiling point (°f) | 54.0 |
| melting point (°f) | –217.0 |
| psat @ 70°f (psia) | 20.3 |
| liquid density @ 70°f (lb/ft³) | 55.78 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1720 |
| specific volume @ 70°f 1 atm (lb/ft³) | 5.82 |
| specific gravity | 2.336 |
| specific heat @ 70°f (btu/lbmol-°f) | 15.41 |
ethylene
| formula | c₂h₄ |
| molecular weight (lb/mol) | 28.05 |
| critical temp. (°f) | 49.1 |
| critical pressure (psia) | 742.7 |
| boiling point (°f) | –154.8 |
| melting point (°f) | –272.5 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0730 |
| specific volume @ 70°f 1 atm (lb/ft³) | 13.70 |
| specific gravity | 0.992 |
| specific heat @ 70°f (btu/lbmol-°f) | 10.28 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
fluorine
| formula | f₂ |
| molecular weight (lb/mol) | 38.00 |
| critical temp. (°f) | –199.9 |
| critical pressure (psia) | 754.6 |
| boiling point (°f) | –306.8 |
| melting point (°f) | –363.4 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0983 |
| specific volume @ 70°f 1 atm (lb/ft³) | 10.17 |
| specific gravity | 1.336 |
| specific heat @ 70°f (btu/lbmol-°f) | 7.49 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
halocarbon-116
| formula | c2f6 |
| molecular weight (lb/mol) | 138.01 |
| critical temp. (°f) | 67.5 |
| critical pressure (psia) | 432.2 |
| boiling point (°f) | -108.7 |
| melting point (°f) | -149.3 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.3616 |
| specific volume @ 70°f 1 atm (lb/ft³) | 2.77 |
| specific gravity | 4.913 |
| specific heat @ 70°f (btu/lbmol-°f) | 25.25 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
halocarbon-23
| formula | chf₃ |
| molecular weight (lb/mol) | 70.01 |
| critical temp. (°f) | 78.7 |
| critical pressure (psia) | 701.4 |
| boiling point (°f) | –115.5 |
| melting point (°f) | –247.3 |
| psat @ 70°f (psia) | 626.0 |
| liquid density @ 70°f (lb/ft³) | 48.67 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1827 |
| specific volume @ 70°f 1 atm (lb/ft³) | 5.47 |
| specific gravity | 2.482 |
| specific heat @ 70°f (btu/lbmol-°f) | 12.25 |
helium (he)
| formula | he |
| molecular weight (lb/mol) | 4.00 |
| critical temp. (°f) | –450.3 |
| critical pressure (psia) | 33.0 |
| boiling point (°f) | –452.1 |
| melting point (°f) | -- |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0103 |
| specific volume @ 70°f 1 atm (lb/ft³) | 96.65 |
| specific gravity | 0.138 |
| specific heat @ 70°f (btu/lbmol-°f) | 4.97 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
hydrogen (h₂)
| formula | h₂ |
| molecular weight (lb/mol) | 2.02 |
| critical temp. (°f) | –400.0 |
| critical pressure (psia) | 187.5 |
| boiling point (°f) | –423.0 |
| melting point (°f) | –434.5 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0052 |
| specific volume @ 70°f 1 atm (lb/ft³) | 191.90 |
| specific gravity | 0.069 |
| specific heat @ 70°f (btu/lbmol-°f) | 6.87 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
hydrogen chloride
| formula | hcl |
| molecular weight (lb/mol) | 36.46 |
| critical temp. (°f) | 124.5 |
| critical pressure (psia) | 1199.2 |
| boiling point (°f) | –120.8 |
| melting point (°f) | –173.6 |
| psat @ 70°f (psia) | 629.1 |
| liquid density @ 70°f (lb/ft³) | 51.28 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0948 |
| specific volume @ 70°f 1 atm (lb/ft³) | 10.54 |
| specific gravity | 1.289 |
| specific heat @ 70°f (btu/lbmol-°f) | 7.29 |
hydrogen fluoride
| formula | hf |
| molecular weight (lb/mol) | 20.01 |
| critical temp. (°f) | 370.4 |
| critical pressure (psia) | 940.5 |
| boiling point (°f) | 67.14 |
| melting point (°f) | –118.4 |
| psat @ 70°f (psia) | 15.54 |
| liquid density @ 70°f (lb/ft³) | 60.26 |
| gas density @ 70°f 1 atm (lb/ft³) | (note 2) |
| specific volume @ 70°f 1 atm (lb/ft³) | (note 2) |
| specific gravity | (note 2) |
| specific heat @ 70°f (btu/lbmol-°f) | (note 2) |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
hydrogen sulfide
| formula | h₂s |
| molecular weight (lb/mol) | 34.08 |
| critical temp. (°f) | 212.8 |
| critical pressure (psia) | 1306.5 |
| boiling point (°f) | –74.9 |
| melting point (°f) | –122.0 |
| psat @ 70°f (psia) | 263.6 |
| liquid density @ 70°f (lb/ft³) | 48.52 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0888 |
| specific volume @ 70°f 1 atm (lb/ft³) | 11.26 |
| specific gravity | 1.207 |
| specific heat @ 70°f (btu/lbmol-°f) | 8.29 |
krypton
| formula | kr |
| molecular weight (lb/mol) | 83.80 |
| critical temp. (°f) | –82.8 |
| critical pressure (psia) | 798.0 |
| boiling point (°f) | –244.1 |
| melting point (°f) | –251.3 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.2172 |
| specific volume @ 70°f 1 atm (lb/ft³) | 4.60 |
| specific gravity | 2.951 |
| specific heat @ 70°f (btu/lbmol-°f) | 4.99 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
methane
| formula | ch₄ |
| molecular weight (lb/mol) | 16.04 |
| critical temp. (°f) | –116.2 |
| critical pressure (psia) | 673.0 |
| boiling point (°f) | –258.7 |
| melting point (°f) | –296.5 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0416 |
| specific volume @ 70°f 1 atm (lb/ft³) | 24.06 |
| specific gravity | 0.565 |
| specific heat @ 70°f (btu/lbmol-°f) | 8.53 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
neon
| formula | ne |
| molecular weight (lb/mol) | 20.18 |
| critical temp. (°f) | –379.8 |
| critical pressure (psia) | 384.9 |
| boiling point (°f) | –410.9 |
| melting point (°f) | –415.5 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0522 |
| specific volume @ 70°f 1 atm (lb/ft³) | 19.17 |
| specific gravity | 0.709 |
| specific heat @ 70°f (btu/lbmol-°f) | 4.97 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
nitrogen (n₂)
| formula | n₂ |
| molecular weight (lb/mol) | 28.01 |
| critical temp. (°f) | –232.5 |
| critical pressure (psia) | 492.3 |
| boiling point (°f) | –320.5 |
| melting point (°f) | –345.9 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0725 |
| specific volume @ 70°f 1 atm (lb/ft³) | 13.80 |
| specific gravity | 0.967 |
| specific heat @ 70°f (btu/lbmol-°f) | 6.97 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
nitrogen trifluoride
| formula | nf₃ |
| molecular weight (lb/mol) | 71.00 |
| critical temp. (°f) | –38.5 |
| critical pressure (psia) | 646.9 |
| boiling point (°f) | –200.2 |
| melting point (°f) | –340.2 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1842 |
| specific volume @ 70°f 1 atm (lb/ft³) | 5.43 |
| specific gravity | 2.503 |
| specific heat @ 70°f (btu/lbmol-°f) | 12.66 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
nitrous oxide
| formula | n₂o |
| molecular weight (lb/mol) | 44.01 |
| critical temp. (°f) | 97.6 |
| critical pressure (psia) | 1053.3 |
| boiling point (°f) | –128.3 |
| melting point (°f) | –131.6 |
| psat @ 70°f (psia) | 751.3 |
| liquid density @ 70°f (lb/ft³) | 48.21 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1145 |
| specific volume @ 70°f 1 atm (lb/ft³) | 8.74 |
| specific gravity | 1.555 |
| specific heat @ 70°f (btu/lbmol-°f) | 9.17 |
octafluoropropane
| formula | c₃f₈ |
| molecular weight (lb/mol) | 188.02 |
| critical temp. (°f) | 161.4 |
| critical pressure (psia) | 386.1 |
| boiling point (°f) | –34.3 |
| melting point (°f) | –233.8 |
| psat @ 70°f (psia) | 112.8 |
| liquid density @ 70°f (lb/ft³) | 84.66 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.4956 |
| specific volume @ 70°f 1 atm (lb/ft³) | 2.02 |
| specific gravity | 6.734 |
| specific heat @ 70°f (btu/lbmol-°f) | 35.48 |
oxygen (o₂)
| formula | o₂ |
| molecular weight (lb/mol) | 32.00 |
| critical temp. (°f) | –181.8 |
| critical pressure (psia) | 729.1 |
| boiling point (°f) | –297.3 |
| melting point (°f) | –361.9 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0828 |
| specific volume @ 70°f 1 atm (lb/ft³) | 12.08 |
| specific gravity | 1.1 |
| specific heat @ 70°f (btu/lbmol-°f) | 7.03 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
phosphine
| formula | ph₃ |
| molecular weight (lb/mol) | 34.00 |
| critical temp. (°f) | 124.9 |
| critical pressure (psia) | 947.9 |
| boiling point (°f) | –126.0 |
| melting point (°f) | –208.8 |
| psat @ 70°f (psia) | 493.2 |
| liquid density @ 70°f (lb/ft³) | 35.50 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.0885 |
| specific volume @ 70°f 1 atm (lb/ft³) | 11.30 |
| specific gravity | 1.203 |
| specific heat @ 70°f (btu/lbmol-°f) | 8.93 |
phosphorus pentafluoride
| formula | pf₅ |
| molecular weight (lb/mol) | 125.97 |
| critical temp. (°f) | 66.1 |
| critical pressure (psia) | 492.3 |
| boiling point (°f) | –120.1 |
| melting point (°f) | –136.8 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.3230 |
| specific volume @ 70°f 1 atm (lb/ft³) | 3.10 |
| specific gravity | 4.310 |
| specific heat @ 70°f (btu/lbmol-°f) | 20.27 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
propane
| formula | c₃h₈ |
| molecular weight (lb/mol) | 44.10 |
| critical temp. (°f) | 206.6 |
| critical pressure (psia) | 617.6 |
| boiling point (°f) | –43.7 |
| melting point (°f) | –305.8 |
| psat @ 70°f (psia) | 124.9 |
| liquid density @ 70°f (lb/ft³) | 31.12 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1160 |
| specific volume @ 70°f 1 atm (lb/ft³) | 8.62 |
| specific gravity | 1.576 |
| specific heat @ 70°f (btu/lbmol-°f) | 17.71 |
propylene
| formula | c₃h₆ |
| molecular weight (lb/mol) | 42.08 |
| critical temp. (°f) | 197.5 |
| critical pressure (psia) | 666.3 |
| boiling point (°f) | –53.8 |
| melting point (°f) | –301.4 |
| psat @ 70°f (psia) | 152.2 |
| liquid density @ 70°f (lb/ft³) | 31.92 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1105 |
| specific volume @ 70°f 1 atm (lb/ft³) | 9.05 |
| specific gravity | 1.501 |
| specific heat @ 70°f (btu/lbmol-°f) | 15.56 |
silicon tetrachloride
| formula | sicl₄ |
| molecular weight (lb/mol) | 169.90 |
| critical temp. (°f) | 453.0 |
| critical pressure (psia) | 543.8 |
| boiling point (°f) | 136.6 |
| melting point (°f) | –94.0 |
| psat @ 70°f (psia) | 4.0 |
| liquid density @ 70°f (lb/ft³) | 92.13 |
| gas density @ 70°f 1 atm (lb/ft³) | (note 2) |
| specific volume @ 70°f 1 atm (lb/ft³) | (note 2) |
| specific gravity | (note 2) |
| specific heat @ 70°f (btu/lbmol-°f) | (note 2) |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
silicon tetrafluoride
| formula | sif₄ |
| molecular weight (lb/mol) | 104.08 |
| critical temp. (°f) | 6.5 |
| critical pressure (psia) | 539.3 |
| boiling point (°f) | –138.6 |
| melting point (°f) | –124.2 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.2711 |
| specific volume @ 70°f 1 atm (lb/ft³) | 3.69 |
| specific gravity | 3.683 |
| specific heat @ 70°f (btu/lbmol-°f) | 17.50 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere
sulfur dioxide
| formula | so₂ |
| molecular weight (lb/mol) | 64.06 |
| critical temp. (°f) | (°f) 315.5 |
| critical pressure (psia) | 1142.0 |
| boiling point (°f) | 14.3 |
| melting point (°f) | –103.9 |
| psat @ 70°f (psia) | 49.3 |
| liquid density @ 70°f (lb/ft³) | 85.98 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.1682 |
| specific volume @ 70°f 1 atm (lb/ft³) | 5.94 |
| specific gravity | 2.285 |
| specific heat @ 70°f (btu/lbmol-°f) | 9.58 |
sulfur hexafluoride
| formula | sf₆ |
| molecular weight (lb/mol) | 146.05 |
| critical temp. (°f) | 114.0 |
| critical pressure (psia) | 545.2 |
| boiling point (°f) | –83 |
| melting point (°f) | –58.9 |
| psat @ 70°f (psia) | 314.4 |
| liquid density @ 70°f (lb/ft³) | 86.25 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.3824 |
| specific volume @ 70°f 1 atm (lb/ft³) | 2.61 |
| specific gravity | 5.196 |
| specific heat @ 70°f (btu/lbmol-°f) | 22.91 |
sulfur tetrafluoride
| formula | sf₄ |
| molecular weight (lb/mol) | 108.06 |
| critical temp. (°f) | 195.6 |
| critical pressure (psia) | -- |
| boiling point (°f) | –40.7 |
| melting point (°f) | –186 |
| psat @ 70°f (psia) | 154.7 |
| liquid density @ 70°f (lb/ft³) | -- |
| gas density @ 70°f 1 atm (lb/ft³) | 0.278 |
| specific volume @ 70°f 1 atm (lb/ft³) | 3.59 |
| specific gravity | 3.71 |
| specific heat @ 70°f (btu/lbmol-°f) | -- |
tetrafluoromethane
| formula | cf₄ |
| molecular weight (lb/mol) | 88.00 |
| critical temp. (°f) | –50.2 |
| critical pressure (psia) | 543.6 |
| boiling point (°f) | –198.5 |
| melting point (°f) | –298.5 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.2285 |
| specific volume @ 70°f 1 atm (lb/ft³) | 4.38 |
| specific gravity | 3.104 |
| specific heat @ 70°f (btu/lbmol-°f) | 14.43 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere.
tungsten hexafluoride
| formula | formula wf₆ |
| molecular weight (lb/mol) | 297.84 |
| critical temp. (°f) | (°f) 337.7 |
| critical pressure (psia) | 619.3 |
| boiling point (°f) | 62.7 |
| melting point (°f) | 35.6 |
| psat @ 70°f (psia) | 17.1 |
| liquid density @ 70°f (lb/ft³) | 216.13 |
| gas density @ 70°f 1 atm (lb/ft³) | 0.7951 |
| specific volume @ 70°f 1 atm (lb/ft³) | 1.26 |
| specific gravity | 10.803 |
| specific heat @ 70°f (btu/lbmol-°f) | 28.37 |
xenon
| formula | xe |
| molecular weight (lb/mol) | 131.3 |
| critical temp. (°f) | 61.9 |
| critical pressure (psia) | 847.1 |
| boiling point (°f) | –162.6 |
| melting point (°f) | –169.4 |
| psat @ 70°f (psia) | (note 1) |
| liquid density @ 70°f (lb/ft³) | (note 1) |
| gas density @ 70°f 1 atm (lb/ft³) | 0.3414 |
| specific volume @ 70°f 1 atm (lb/ft³) | 2.93 |
| specific gravity | 4.639 |
| specific heat @ 70°f (btu/lbmol-°f) | 5.02 |
notes
1 = signifies at 70°f, the compound is above its critical temperature.
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere
2 = signifies that at 70°f, the compound is below the normal boiling point and only the equilibrium vapor is present at 1 atmosphere