Ammonia (NH3)
DESCRIPTION (Ammonia):
At room temperature and atmospheric
pressure, ammonia is a colorless, alkaline gas having a pungent odor. Ammonia dissolves
readily in water. It is shipped as a liquefied gas under its own vapor pressure of 114
psig at 70° F. Typical uses for ammonia include soil fertilization, industrial
refrigeration, metal treating operations, and the manufacture of alkalis, salts, dyes,
pharmaceuticals and nylon.
PHYSICAL CONSTANTS (Ammonia):
| Molecular Weight: |
17.031 |
| Vapor Pressure of pure liquid
@ 70° F.: |
114.1 psig |
| Specific Volume @ 70° F., 1
atm.: |
22.6 cu.ft/lb |
| Boiling Point @ 1.0 atm. : |
-28.0° F |
| Triple Point @ 1 atm. : |
-107.9° F |
| Triple Point Pressure |
45.58 mm Hg |
| Specific Gravity, Gas @ 0° C.,
1 atm. (Air = 1): |
0.5970 |
| Density, Gas @ b.p.: |
0.00089 g/ml |
| Density, Liquid @ b.p.: |
0.674 g/ml |
| Critical Temperature: |
270.4° F |
| Critical Pressure: |
1639 psia |
| Critical Density: |
0.235 g/ml |
| Latent Heat of Vaporization @
b.p. |
589.4 BTU/lb |
| Flammable Limits in Air: |
15-28% by volume |
| Autoignition Temperature: |
635° F |
| Gross Heat of Combustion @
60° F., 1 atm. |
1483.8 BTU/ft3 |
| Specific Heat, Gas @ 25° C.,
1 atm. Cp: |
0.5160 BTU/lb.° F |
| Specific Heat, Gas @ 25° C.,
1 atm. Cv: |
0.4065 BTU/lb.° F |
| Specific Heat Ratio, Gas @
25° C., 1 atm., Cp/Cv: |
1.269 |
| Thermal Conductivity, Gas @
0° C, 1 atm. : |
5.22x10-4 cal/(sec) (cm2 )(° C/cm) |
| Viscosity, Gas @ 25° C., 1
atm. : |
0.00918 centipoise |
| Viscosity, Liquid @ -33.5° C.,
1 atm. : |
0.266 centipoise |
| Heat of Formation, Gas @
25° C.: |
-11.4 kcal/mole |
| Entropy, Gas @ 25° C., 1 atm.
: |
45.967 cal/mol ° C |
| Solubility in Water @ 0° C.,
1 atm. : |
42.8% by weight |
| Solubility in Methanol
(absolute) : |
29.3% by weight |
| Solubility in Ethanol
(absolute) : |
20.95% by weight |
|
|
COMPATIBLE MATERIALS
(Ammonia):
All equipment coming in contact should be
constructed of iron or steel. All piping should be rigid steel. Steel reinforced neoprene
should be used for short connections.
CYLINDER CONNECTIONS (Ammonia):
Standard CGA V-1 Cylinder Connection threaded: CGA 240, CGA 705
Standard CGA V-1 Cylinder Connection yoke: CGA 800, CGA 845
Standard CGA V-1 Cylinder Connection ultra high integrity: CGA 720
|
