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Carbon
Dioxide (CO2) |
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| DESCRIPTION (Carbon Dioxide): |
| Carbon Dioxide is a non-flammable,
colorless, odorless gas. It is shipped in high pressure steel cylinders as a liquid under
its own vapor pressure of 830 psig at 70°F. There are many uses for Carbon Dioxide some
of the more typical are refrigeration, carbonation and as the extinguishing agent in fire
extinguishers. |
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| PHYSICAL CONSTANTS (Carbon
Dioxide): CAS # 124-38-9 |
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| Molecular Weight: |
44.01 |
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Specific Heat, Gas @ 25º C.,
1 atm. Cp, cal/g.ºC |
0.205 |
| Vapor Pressure of pure liquid
@ 70º F, psig |
830 |
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Specific Heat, Gas @ 25º C.,
1 atm. Cv, cal/g.ºC |
0.1565 |
| Specific Volume @ 70º F., 1
atm, cu.ft/lb |
8.76 |
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Specific Heat Ratio, Gas @
25º C., 1 atm., Cp/Cv: |
1.310 |
| Sublimation Point @ 1.0 atm.,
ºF (ºC) |
-109.3 (-78.5) |
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Thermal Conductivity, Gas @
32º F, BTU/(hr) (ft2 )(ºF/ft) |
0.0085 |
| Triple Point @ 5.11 atm.,
ºF (ºC) |
-69.9 (-56.6) |
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Thermal Conductivity, Gas @
212ºF, BTU/(hr) (ft2 )(ºF/ft) |
0.0133 |
| Specific Gravity, Gas @ 0ºC.,
1 atm. (Air = 1): |
1.521 |
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Viscosity, Liquid @ 70ºF., 1
atm., centipoise |
0.0148 |
| Critical
Temperature, ºF (ºC) |
87.8 (31) |
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Heat of Formation, Gas @
25ºC., kcal/mole |
-94.054 |
| Critical
Pressure, psia |
1071.6 |
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Entropy, Gas @ 25ºC., 1 atm.,
cal/mol ºC |
51.072 |
| Critical
Density, g/ml |
0.468 |
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Solubility in Water @ 0º C.,
1 atm., vol/vol water |
0.759 |
| Latent Heat of Vaporization @
t.p., BTU/lb |
149.6 |
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pKa-value |
6.1, 10.25 |
| Latent Heat of Vaporization @
0ºC, BTU/lb |
101.03 |
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| COMPATIBLE MATERIALS (Carbon
Dioxide): |
| Carbon Dioxide in
it's gaseous form is a relatively inert material and therefore can be used in combination
with any available metals. However, liquid Carbon Dioxide has the potential to form
Carbonic Acid and only materials resistant to this acid will need to be used. |
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Last edited on:
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July 06, 2006
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