Isobutane CH(CH3)3
DESCRIPTION (Isobutane):
Isobutane is a colorless, flammable gas. It is
shipped as a liquefied gas under it's own vapor pressure of approximately 30.7 psig @
70° F. Typically used in the manufacture of aviation fuels and as a calibration gas for
temperature and pressure gauges.
PHYSICAL CONSTANTS
(Isobutane):
| Molecular Weight: |
58.124 |
| Vapor Pressure @ 70° F.: |
30.7 psig |
| Specific Volume @ 70° F., 1
atm.: |
6.5 cu.ft/lb |
| Boiling Point @ 1.0 atm. : |
10.9° F |
| Freezing Point @ 1 atm. : |
-255.3° F |
| Specific Gravity, Gas @ 60°
F., 1 atm. (Air = 1): |
2.01 |
| Density, Liquid @ 60° F., 1
atm.: |
0.563 g/L |
| Critical Temperature: |
275.0° F |
| Critical Pressure: |
529.2 psia |
| Critical Density: |
0.221 g/ml |
| Latent Heat of Vaporization @
b.p.: |
87.56 cal/g |
| Latent Heat of Fusion @ m.p.: |
18.67 cal/g |
| Flammable Limits in Air: |
1.8-8.4% by volume |
| Autoignition Temperature: |
1010° F |
| Gross Heat of Combustion @
60° F., 1 atm. |
3352.15 BTU/ft3 |
| Specific Heat, Liquid @ 60°
F., 1 atm. Cp: |
0.5695 cal/(g)(° C) |
| Specific Heat, Gas @ 60° F.,
1 atm. Cp: |
0.3872 cal/(g)(° C) |
| Specific Heat, Gas @ 60° F.,
1 atm. Cv: |
0.3530 cal/(g)(° C) |
| Specific Heat Ratio, Gas @
60° F., 1 atm., Cp/Cv: |
1.097 |
| Thermal Conductivity, Gas @
0° C. : |
0.01169 BTU/hr ft2 ° F/ft |
| Viscosity, Gas @ 23° C., 1
atm. : |
0.00755 centipoise |
| Surface Tension @ -20° C., 1
atm. : |
15.28 dynes/cm |
| Solubility in Water @ 17° C.,
1 atm. : |
1.7 cc/ 100 cc H2O |
CYLINDER CONNECTIONS
(Isobutane):
Standard CGA V-1 Cylinder Connection CGA 510
|
