Beta version#
BETA TEST VERSION OF THIS ITEM
This online calculator is currently under heavy development. It may or it may NOT work correctly.
You CAN try to use it. You CAN even get the proper results.
However, please VERIFY all results on your own, as the level of completion of this item is NOT CONFIRMED.
Feel free to send any ideas and comments !
This online calculator is currently under heavy development. It may or it may NOT work correctly.
You CAN try to use it. You CAN even get the proper results.
However, please VERIFY all results on your own, as the level of completion of this item is NOT CONFIRMED.
Feel free to send any ideas and comments !
Settings#
| Unit (critical pressure) | ||
| Decimals |
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liquids#
| Substance | Molecular formula | Critical pressure [MPa] |
| acetone | (CH3)2CO | 4.7 |
| ethanol | C2H5OH | 9.9 |
| benzene | C6H6 | 4.9 |
| chloroform | CHCl3 | 5.5 |
alcohols#
| Substance | Molecular formula | Critical pressure [MPa] |
| ethanol | C2H5OH | 9.9 |
other inorganic#
| Substance | Molecular formula | Critical pressure [MPa] |
| ammonia | NH3 | 11.15 |
| phosphine | PH3 | 6.5 |
| argon | Ar | 4.8 |
| nitrogen | N2 | 3.35 |
| helium | He | 0.23 |
| krypton | Kr | 5.4 |
| xenon | Xe | 5.8 |
| neon | Ne | 2.7 |
| ozone | O3 | 9.2 |
gases#
| Substance | Molecular formula | Critical pressure [MPa] |
| ammonia | NH3 | 11.15 |
| methane | CH4 | 4.6 |
| carbon dioxide | CO2 | 7.3 |
| hydrogen chloride | HCl | 8.3 |
| hydrogen sulfuride | H2S | 8.9 |
| ethene (ethylene) | C2H4 | 5.1 |
| nitrogen (II) oxide | NO | 6.4 |
| phosphine | PH3 | 6.5 |
| sulfur (IV) oxide | SO2 | 7.78 |
| chlorine | Cl2 | 7.6 |
| hydrogen | H2 | 1.3 |
| oxygen | O2 | 4.97 |
| steam | H2O | 21.8 |
| vinyl chloride (chloroethene) | CH2CHCl | 5.2 |
| nitrogen | N2 | 3.35 |
| fluorine | F2 | 5.5 |
| helium | He | 0.23 |
| krypton | Kr | 5.4 |
| xenon | Xe | 5.8 |
| neon | Ne | 2.7 |
| ozone | O3 | 9.2 |
hydrocarbons#
| Substance | Molecular formula | Critical pressure [MPa] |
| methane | CH4 | 4.6 |
| ethene (ethylene) | C2H4 | 5.1 |
| benzene | C6H6 | 4.9 |
oxides#
| Substance | Molecular formula | Critical pressure [MPa] |
| carbon dioxide | CO2 | 7.3 |
| carbon monoxide | CO | 3.45 |
| nitrogen (II) oxide | NO | 6.4 |
| sulfur (IV) oxide | SO2 | 7.78 |
inorganic acids#
| Substance | Molecular formula | Critical pressure [MPa] |
| hydrogen bromide | HBr | 8.4 |
| hydrogen chloride | HCl | 8.3 |
| hydrogen sulfuride | H2S | 8.9 |
other organic#
| Substance | Molecular formula | Critical pressure [MPa] |
| chloroform | CHCl3 | 5.5 |
| vinyl chloride (chloroethene) | CH2CHCl | 5.2 |
halogens#
| Substance | Molecular formula | Critical pressure [MPa] |
| chlorine | Cl2 | 7.6 |
| fluorine | F2 | 5.5 |
Some facts#
- Critical pressure is the pressure below which it is not possible to carry out condensation of gas at a critical temperature.
- Critical pressure is specific for a given substance. For example, the critical pressure of hydrogen (H2) is approximately 1.3 MPa, i.e. 13 atmospheres.
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