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Các thuộc tính lý hoá của các loại Gas.
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English Units |
NormalBoiling Point (1 atm) |
Gas Phase Properties @ 32°F & @1 atm |
Liquid Phase Properties
@ B P& @ 1 atm |
Triple Point | Critical Point | |||||||||
| Temp. | Latent Heat of Vaporization | Specific Gravity | Specific Heat (Cp) | Density | Specific Gravity | Specific Heat (Cp) | Temp. | Pressure | Temp. | Pressure | Density | |||
| Substance |
Chemical Symbol |
Mol. Weight |
° F | BTU/lb | Air = 1 | BTU/lb °F | lb/cu. ft | Water = 1 | BTU/lb °F | °F | psia | °F | psia | lb/cu ft |
| Air | -- | 28.98 | -317.8 | 88.2 | 1 | 0.241 | 0.08018 | 0.873 | 0.4454 | -352.1 | -- | -221.1 | 547 | 21.9 |
| Oxygen | O2 | 32.00 | -297.3 | 91.7 | 1.113 | 0.2197 | 0.089212 | 1.14 | 0.4058 | -361.8 | 0.02147 | -181.43 | 731.4 | 27.22 |
| Nitrogen | N2 | 28.01 | -320.4 | 85.6 | 0.9737 | 0.249 | 0.07807 | 0.808 | 0.4877 | -346.0 | 1.81 | -232.4 | 493 | 19.6 |
| Argon | Ar | 39.95 | -302.6 | 69.8 | 1.39 | 0.125 | 0.11135 | 1.4 | 0.2575 | -308.8 | 9.99 | -188.1 | 711.5 | 33.44 |
| Carbon Dioxide | CO2 | 44.01 | -109.3a | 245.5b | 1.524 | 0.199 | 0.12341 | 1.18c | -- | -69.9 | 75.1 | 87.9 | 1070.6 | 29.2 |
| Hydrogen | H2 | 2.02 | -423 | 191.7 | 0.06998 | 3.425 | 0.005611 | 0.071 | 2.309 | -434.6 | 1.045 | -399.93 | 190.8 | 1.88 |
| Carbon Monoxide | CO | 28.01 | -312.7 | 92.79 | 0.9736 | 0.2478 | 0.07806 | 0.79 | -- | -337.1 | 2.2 | -220.4 | 507.5 | 18.79 |
| Water | H2O | 18.02 | 212 | 970.6 | -- | 0.8784d | 0.0368d | 0.95855 | 1.007 | 32.0 | 0.088 | 705.182 | 3200.5 | 20.1 |
| Methane | CH4 | 16.04 | -258.68 | 219.22 | 0.559 | 0.593 | 0.0448 | 0.425 | 0.8314 | -296.5 | 1.69 | -115.78 | 673.1 | 10.09 |
| Ammonia | NH3 | 17.03 | -28 | 589.3 | 0.6003 | 0.520 | 0.04813 | 0.6819 | -- | -107.9 | 0.88 | 271.4 | 1657 | 14.7 |
| Helium | He | 4.00 | -452.06 | 8.72 | 0.139 | 1.25 | 0.01114 | 0.124 | 1.086 | NONE | NONE | -450.31 | 33 | 4.347 |
| Neon | Ne | 20.18 | -410.9 | 37.08 | 0.701 | 0.25 | 0.05621 | 1.207 | 0.4483 | -415.4 | 6.29 | -379.8 | 384.9 | 30.15 |
| Krypton | Kr | 83.80 | -244 | 46.2 | 2.887 | 0.06 | 0.2315 | 2.41 | 0.1273 | -251.3 | 10.6 | -82.8 | 798 | 56.7 |
| Xenon | Xe | 131.30 | -162.6 | 41.4 | 4.55 | 0.038 | 0.365 | 3.06 | 0.08121 | -169.2 | 11.84 | 61.9 | 847 | 68.67 |
| Ozone | O3 | 47.99 | -168.3 | 6530 | 1.656 | 9.41 | -- | 1.352 | -- | -314.5 | 1.65 | 10.13 | 808.1 | 33.71 |
| Hydrogen Sulfide | H2S | 34.08 | -76.4 | 235.6 | 1.198 | 0.245 | 0.09608 | 0.9136 | -- | -- | -- | 212.9 | 1306.5 | 21.6 |
| Sulfur Dioxide | SO2 | 64.06 | 14 | 167.5 | 2.279 | 0.149 | 0.18272 | 1.46 | -- | -103.9 | 0.2429 | 315.4 | 1143 | 32.6 |
| Ethane | C2H6 | 30.07 | -127.53 | 210.41 | 1.056 | 0.386 | 0.08469 | 0.546 | -- | -297.9 | 14.70 | 86.96 | 708.35 | 12.67 |
| Ethylene | C2H4 | 28.05 | -154.8 | 208 | 0.978 | 0.399 | 0.07868 | 0.567 | -- | -272.5 | 1.0146 | 49.82 | 745 | 14.2 |
| Acetylene | C2H2 | 26.04 | -118.4a | 264c | 0.906 | 0.383 | 0.07314 | 0.613 | -- | -116.0 | 17.7 | 96.8 | 907 | 14.4 |
| Propane | C3H8 | 44.10 | -43.67 | 183.05 | 1.573 | 0.388 | 0.1261 | 0.58 | -- | -- | -- | 206.01 | 616.3 | 13.5 |
| Propylene | C3H6 | 42.08 | -53.9 | 188.18 | 1.481 | 0.355 | 0.11249 | 0.61 | -- | -- | -- | 197.2 | 670 | 14.5 |
| Methanol | CH3OH | 32.04 | 148.2 | 473 | -- | 0.3274 | 49.44d | 0.795 | 0.6055 | -143.4 | -- | 464.1 | 1154.2 | 16.981 |
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a Sublimation point b Sublimation Enthalpy c Triple point d Boiling point | ||||||||||||||
| Metric Units |
Boiling Point @ 101.325 kPa |
Gas Phase Properties @ 0° C & @ 101.325 kPa |
Liquid Phase Properties
@ B.P., & @ 101.325 kPa |
Triple Point | Critical Point | |||||||||
| Temp. | Latent Heat of Vaporization | Specific Gravity | Specific Heat (Cp) | Density | Specific Gravity | Specific Heat (Cp) | Temp. | Pressure | Temp. | Pressure | Density | |||
| Substance |
Chemical Symbol |
Mol. Weight |
°C | kJ/kg | Air = 1 | kJ/kg ° C | kg/m3 | Water = 1 | kJ/kg ° C | °C | kPa abs | ° C | kPa abs | kg/m3 |
| Air | -- | 28.98 | -194.3 | 205.0 | 1 | 1.01 | 1.2929 | 0.873 | 1.865 | -213.4 | -- | -140.6 | 3771 | 351 |
| Oxygen | O2 | 32.00 | -182.96 | 213.0 | 1.113 | 0.9191 | 1.429 | 1.14 | 1.669 | -218.8 | 0.148 | -188.57 | 5043 | 436.1 |
| Nitrogen | N2 | 28.01 | -195.8 | 199.1 | 0.9737 | 1.04 | 1.2506 | 0.808 | 2.042 | -210 | 12.5 | -146.9 | 3399 | 314.9 |
| Argon | Ar | 39.95 | -185.9 | 162.3 | 1.39 | 0.523 | 1.7837 | 1.40 | 1.078 | -189.3 | 68.9 | -122.3 | 4905 | 535.6 |
| Carbon Dioxide | CO2 | 44.01 | -78.5 | 571.3 | 1.539 | 0.85 | 1.9769 | 1.18c | -- | -56.6 | 517.3 | 31.1 | 7382 | 468 |
| Hydrogen | H2 | 2.02 | -252.8 | 446.0 | 0.06998 | 14.34 | 0.08988 | 0.071 | 9.668 | -259.2 | 7.205 | -239.96 | 1315 | 30.12 |
| Carbon Monoxide | CO | 28.01 | -191.5 | 215.8 | 0.9736 | 1.037 | 1.2504 | 0.79 | -- | -205.1 | 15.2 | -140.2 | 3499 | 301 |
| Water | H2O | 18.02 | 100.0 | 2256.9 | -- | 2.0418d | .58958d | 0.95855 | 4.216 | 0.01 | 101.9 | 373.99 | 22064 | 322 |
| Methane | CH4 | 16.04 | -161.49 | 509.91 | 0.559 | 2.207 | 0.717 | 0.425 | 3.481 | -182.5 | 11.65 | -82.1 | 4640.86 | 161.63 |
| Ammonia | NH3 | 17.03 | -33.3 | 1371.0 | 0.6003 | 2.191 | 0.771 | 0.6819 | -- | -77.7 | 6.1 | 133 | 11350 | 235 |
| Helium | He | 4.00 | -268.9 | 20.28 | 0.139 | 5.19 | 0.17585 | 0.124 | 4.545 | NONE | NONE | -267.9 | 227 | 69.64 |
| Neon | Ne | 20.18 | -246.0 | 86.3 | 0.701 | 1.05 | 0.9004 | 1.207 | 1.877 | -248.6 | 43.4 | -228.8 | 2654 | 483 |
| Krypton | Kr | 83.80 | -153.4 | 107.5 | 2.887 | 0.251 | 3.708 | 2.41 | 0.533 | -157.4 | 73.2 | -63.8 | 55402 | 908 |
| Xenon | Xe | 131.30 | -108.2 | 96.3 | 4.55 | 0.269 | 5.85 | 3.06 | 0.34 | -111.8 | 81.6 | 16.6 | 5840 | 1100 |
| Ozone | O3 | 47.99 | -111.3 | 151.9 | 1.656 | 39.37 | -- | 1.352 | -- | -192.5 | 11.4 | -12.15 | 55.73 | 540 |
| Hydrogen Sulfide | H2S | 34.08 | -60.2 | 547.83 | 1.198 | 0.147 | 1.539 | 0.9136 | -- | -- | -- | 100.5 | 9008 | 346 |
| Sulfur Dioxide | SO2 | 64.06 | -10.0 | 389.3 | 2.279 | 0.622 | 2.9269 | 1.46 | -- | -75.5 | 1.675 | 157.4 | 7866.9 | 520 |
| Ethane | C2H6 | 30.07 | -88.63 | 489.41 | 1.056 | 1.715 | 1.3566 | 0.546 | -- | -183.3 | 101.325 | 32.2 | 4883.9 | 161.63 |
| Ethylene | C2H4 | 28.05 | -103.8 | 484.0 | 0.978 | 1.516 | 1.2604 | 0.567 | -- | -169.2 | 0.1014 | 9.9 | 5041 | 203 |
| Acetylene | C2H2 | 26.04 | -83.3 | 614.0c | 0.906 | 1.6 | 1.1716 | 0.613 | -- | -82.2 | 122 | 36 | 6250 | 228 |
| Propane | C3H8 | 44.10 | -42.04 | 425.77 | 1.573 | 1.625 | 2.02 | 0.58 | -- | -- | -- | 96.672 | 4249.24 | 216.25 |
| Propylene | C3H6 | 42.08 | -47.72 | 437.71 | 1.481 | 1.486 | 1.769 | 0.61 | -- | -- | -- | 91.77 | 4619.49 | 232.27 |
| Methanol | CH3OH | 32.04 | 148.2 | 473.0 | -- | 0.3274 | 0.089d | 0.795 | 2.533 | -143.4 | -- | 464.1 | 1154.2 | 16.981 |
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a Sublimation point b Sublimation Enthalpy c Triple point d Boiling point |
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