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Hydrocarbons and CO2 |
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| Characteristics |
Carbon
dioxide |
Butane |
Isobutane |
| CAS # |
124-38-9 |
106-97-8 |
75-28-5 |
| Molecular Weight, Dalton |
44.01 |
58.1 |
58.1 |
| Vapor Pressure @ 70º F., psig,
(kg/cm2 ) |
830 (58.3) |
16.3(1.14) |
30.7(2.16) |
| Specific Volume @ 70º F., 1
atm., ft3/lb |
8.76 |
6.4 |
6.5 |
| Boiling Point @ 1.0 atm., ºF
(ºC) |
|
31.1(-0.5) |
10.9(-11.7) |
| Freezing Point @ 1 atm., ºF
(ºC) |
-109.3
(-78.5) |
-217
(-138.3) |
-255
(-159.4) |
| Specific Gravity, Gas @ 60º
F., 1 atm. (Air = 1), |
1.521 |
2.076 |
2.01 |
| Density, Liquid @ 20ºC.,
Saturation Pressure, g/ml |
|
0.5788 |
0.563 |
| Critical Temperature, ºF
(ºC) |
87.8
(31) |
306
(152) |
275
(135) |
| Critical Pressure, psia,
(kg/cm2 ) |
1072
(75.3) |
551
(38.7) |
529
(37.2) |
| Critical Density, g/ml |
0.468 |
0.225 |
0.221 |
| Triple Point @ 5.11 atm., ºF
(ºC) |
-69.9(-4.9) |
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| Surface Tension @ -10ºC., 1
atm., dynes/cm |
|
16.0 |
15.3 |
| Viscosity, Gas @ 14.7ºC., 1
atm., cps |
0.0148 |
0.0084 |
0.00755 |
| Specific Heat Ratio, Gas @
60º F., 1 atm., Cp/Cv., |
1.310 |
1.096 |
1.097 |
| Specific Heat, Gas @ 60º F.,
1 atm. Cv, cal/(g)(ºC) |
0.1565 |
0.3566 |
0.3530 |
| Specific Heat, Gas @ 60º F.,
1 atm. Cp, cal/(g)(ºC) |
0.205 |
0.3908 |
0.3872 |
| Specific Heat, Liquid @ 60º
F., 1 atm. Cp, BTU//(lb)(ºF) |
|
0.5636 |
0.5695 |
| Gross Heat of Combustion @
60º F., 1 atm., BTU/ft3 |
|
3374 |
3352 |
| Autoignition Temperature, ºF
(ºC) |
|
761
(405) |
1010
(543) |
| Flammable Limits in Air: by
volume,% |
|
1.9-8.5 |
1.8-8.4 |
| Latent Heat of Fusion @
m.p.,
cal/g |
|
19.17 |
18.67 |
| Latent Heat of Vaporization @
b.p.,cal/g |
149.6 |
92.0 |
87.56 |
| Thermal Conductivity, Gas @
32º F, BTU/(hr) (ft2 )(ºF/ft) |
0.0085 |
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| Thermal Conductivity, Gas @
212ºF,BTU/(hr) (ft2 )(ºF/ft) |
0.0133 |
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| Entropy, Gas @ 25ºC., 1 atm.,
cal/mol ºC |
51.072 |
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Last edited on:
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July 06, 2006
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