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Main
Office
10940 Beaver Dam Rd
Hunt Valley, MD 21030
Ph: 410-666-3200
Fx: 410-666-3631
Central VA
Office
10993 Richardson Rd #13
Ashland, VA 23005
Ph: 804-752-3450
Fx: 804-752-3451
Tidewater
Office
4402 Edwin Rd
Portsmouth, VA 23703
Ph: 757-686-1777
Fx: 757-686-9333
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Gas
Properties
(Approximate Values Calculated at 68°F and
147 psia)
cp = specific heat at constant
pressure
cv = specific heat at constant volume
| Name of
Gas |
Chemical
Formula or Symbol |
Approx.
Molecular Weight
M |
Weight
Density, Pounds per Cubic Foot
p |
Specific
Gravity Relative to Air
Sg |
Individual
Gas Constant
R |
Specific
Heat at Room Temperature Btu/Lb °F |
Heat
Capacity per Cubic Foot |
k
equal to
cp/cv |
| cp |
cv |
cp |
cv |
| Acetylene (ethyne) |
C2H2 |
26.0 |
.0682 |
0.907 |
59.4 |
0.350 |
0.269 |
.0239 |
.0184 |
1.30 |
| Air |
-- |
29.0 |
.0752 |
1.000 |
53.3 |
0.241 |
0.172 |
.0181 |
.0129 |
1.40 |
| Ammonia |
H3N |
17.0 |
.0448 |
.0596 |
91.0 |
0.523 |
0.396 |
.0234 |
.0178 |
1.32 |
| Argon |
Ar |
39.9 |
.1037 |
1.379 |
38.7 |
0.124 |
0.074 |
.0129 |
.0077 |
1.67 |
| Butane |
C4H10 |
58.1 |
.1554 |
2.067 |
26.5 |
0.395 |
0.356 |
.0614 |
.0553 |
1.11 |
| Carbon dioxide |
CO2 |
44.0 |
.1150 |
1.529 |
35.1 |
0.205 |
0.158 |
.0236 |
.0181 |
1.30 |
| Carbon monoxide |
CO |
28.0 |
.0727 |
0.967 |
55.2 |
0.243 |
0.173 |
.0177 |
.0126 |
1.40 |
| Chlorine |
Cl |
70.9 |
.1869 |
2.486 |
21.8 |
0.115 |
0.086 |
.0215 |
.0162 |
1.33 |
| Ethane |
C2H6 |
30.0 |
.0789 |
1.049 |
51.5 |
0.386 |
0.316 |
.0305 |
.0250 |
1.22 |
| Ethylene |
C2H4 |
28.0 |
.0733 |
0.975 |
55.1 |
0.400 |
0.329 |
.0293 |
.0240 |
1.22 |
| Helium |
He |
4.0 |
.01039 |
0.1381 |
386.3 |
1.250 |
0.754 |
.0130 |
.0078 |
1.66 |
| Hydrogen chloride |
HCl |
36.5 |
.0954 |
1.268 |
42.4 |
0.191 |
0.135 |
.0182 |
.0129 |
1.41 |
| Hydrogen |
H |
2.0 |
.00523 |
0.0695 |
766.8 |
3.420 |
2.426 |
.0179 |
.0127 |
1.41 |
| Hydrogen sulphide |
H2S |
34.1 |
.0895 |
1.190 |
45.2 |
0.243 |
0.187 |
.0217 |
.0167 |
1.30 |
| Methane |
CH4 |
16.0 |
.0417 |
0.554 |
96.4 |
0.593 |
0.449 |
.0247 |
.0187 |
1.32 |
| Methyl chloride |
CH3Cl |
50.5 |
.1342 |
1.785 |
30.6 |
0.240 |
0.200 |
.0322 |
.0268 |
1.20 |
| Natural gas |
-- |
19.5 |
.0502 |
0.667 |
79.1 |
0.560 |
0.441 |
.0281 |
.0221 |
1.27 |
| Nitric oxide |
NO |
30.0 |
.0780 |
1.037 |
51.5 |
0.231 |
0.165 |
.0180 |
.0129 |
1.40 |
| Nitrogen |
N |
28.0 |
.0727 |
0.967 |
55.2 |
0.247 |
0.176 |
.0180 |
.0127 |
1.41 |
| Nitrous oxide |
N2O |
44.0 |
.1151 |
1.530 |
35.1 |
0.221 |
0.169 |
.0254 |
.0194 |
1.31 |
| Oxygen |
O |
32.0 |
.0831 |
1.105 |
48.3 |
0.217 |
0.155 |
.0180 |
.0129 |
1.40 |
| Propane |
C3H8 |
44.1 |
.1175 |
1.562 |
35.0 |
0.393 |
0.342 |
.0462 |
.0402 |
1.15 |
| Propene (propylene) |
C3H6 |
42.1 |
.1091 |
1.451 |
36.8 |
0.358 |
0.314 |
.0391 |
.0343 |
1.14 |
| Sulphur dioxide |
SO2 |
64.1 |
.1703 |
2.264 |
24.0 |
0.154 |
0.122 |
.0262 |
.0208 |
1.26 |
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