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Gases - Critical Temperatures and Pressures

Critical temperatures and pressures for some common gases - air, alcohol, ether, oxygen and more

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  • A substance can not exist as a fluid above the Critical Temperature
  • The pressure of saturated vapor at critical temperature is the Critical Pressure
Gas Critical temperature Critical pressure Boiling temperature
(oF) (oC) (psi) (lb/sq.in) (atm) (oF) (oC)
Air -220 -140 573 39 - -
Alcohol (C2H6O) 421 216 956 65 172.4 78
Ammonia (NH3) 266 130 1691 115 -27.4 -33
Benzol (C6H6) 554 292 735 50 176 80
Carbon-dioxide (CO2) 88,2 31 1132 77 -110 -79
Carbon-monoxide (CO) -222 -141 528 35.9 -310 -190
Ether (C4H10O) 381.2 194 544 37 95 35
Hydrogen (H) -402 -242 294 20 -423 -253
Nitrogen (N) -236 -149 514 35 -321 -195
Oxygen (O2) -180 -118 735 50 -297 -183
Water (H2O) 706-716 375-380 3,200 217.8 212 100

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Related Topics

  • Gas and Compressed Air - Gas properties, capacities of pipelines, sizing of relief valves - air, LNG, LPG and more

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Related Documents

  • Ideal Gas Law - In perfect or ideal gas the change in density is directly related to the change of temperature and pressure as expressed by the Ideal Gas Law

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