def
gas
Substance with neither definite volume nor shape
meta
supertypes
| marker |
Marker labels a dict with typing information |
|---|---|
| phenomenon |
Aspect of scientific interest with measurable quantities |
| substance |
Matter in one the three states solid, liquid, or gas |
| fluid |
Liquid or gas |
subtypes
| air |
The mixture of gases which surrounds the earth |
|---|---|
| ch2o |
Formaldehyde (CH₂O) |
| ch4 |
Methane (CH₄) |
| co |
Carbon monoxide (CO) |
| co2 |
Carbon dioxide (CO₂) |
| hfc |
Hydrofluorocarbons |
| n2o |
Nitrous oxide (N₂O) |
| naturalGas |
Fossil fuel energy source consisting largely of methane and other hydrocarbons |
| nf3 |
Nitrogen trifluoride (NF₃) |
| nh3 |
Ammonia (NH₃) |
| no2 |
Nitrogen dioxide (NO₂) |
| o2 |
Oxygen (O₂) - the common dioxygen allotrope in the air |
| o3 |
Ozone (O₃) |
| pfc |
Perfluorocarbons |
| propane |
By-product of natural gas processing and petroleum refining (C₃H₈) |
| sf6 |
Sulphur hexafluoride (SF₆) |
| steam |
Water in its gas form |
| tvoc |
Total volatile organic compound (TVOC) |