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• stationpedia has simple phase diagrams for all Gasses, a more complex phase change diagram can be located Here

Gas may refer to:

• Atmosphere
• Carbon Dioxide (CO₂)
• Fuel (66.6% H₂ + 33.3% O₂)
• Hydrogen (H₂)
• Nitrogen (N₂)
• Nitrous Oxide (N₂O)
• Oxygen (O₂)
• Pollutants (X)
• Volatiles
• Water (H₂O)

Gases

Name	Filter Color	Molar Heat Capacity	Latent Heat	Freezing point [K°/C°]	Boiling Point at 100KPa [K°/C°]	Minimum condensation pressure [kPa] at Temperature [K°/C°]	Max liquid temperature [K°/C°] at Pressure [kPa]
Carbon Dioxide (CO2)	Gray	28.2	0.6kJ/MOL	218K°/-55.3C°	N/A.	517kPa at 218K°/-55.3C°	265K°/-8.1C° at 6000KPa
Nitrogen (N2)	Green	20.6	0.5kJ/MOL	40k°/-233C°	75K°/-198C°	6.3kPa at 40K°/233C°	190K°/-83C° at 6000kPa
Nitrous Oxide (N2O)	Green	37.2	4kJ/MOL	252K°/-21C°	N/A	800KPa at 252K°/-21C°	431K/158C° at 2000kPa
Oxygen (O2)	White	21.1	0.8kJ/Mol	56.4K°/-217C°	90K°/-183C°	6.3kPa at 56.4K/-217 C°	162k°/-111C° at 6000kPa
Pollutant (X)	Black	24.8	2 kJ/MOL	173k°/-99.8C°	N/A	1800kPa at 173K°/-99.8C°	425K°/152C° at 6000kPa
Volatiles (H2)	Red	20.4	1kJ/MOL	81.6K°/-192C°	112K°/-162C°	6.3kPa at 81.6K°/-192C°	195K°/-78.1C° at 6000kPa
Steam (H20)	Blue	72	8kJ/MOL	273K°/0C°	373k°/100C°	6.3kPa at 273K°/0C°	643k°/370C° at 6000kPa

^{* phase change has been added to the game system and most gasses now have an associated liquid and a pure Solids phase .}

Mixtures

Name	Contents	Tank Color	Notes
Fuel	67% H2, 33%O2	Orange	Autoignition at 300C
Air	75% N2, 25% O2	White	16kPa Partial Pressure O2 minimum is required for human player breathing. Hyperoxia is not simulated.

Simulation Mechanics

• Partial ideal gas law (PV=nRT) is simulated.
• Fluid dynamics,are not simulated.
• Phase change has been added into the simulation
• Thermal radiation is not simulated, but vacuum atmosphere (not rooms) will absorb a fixed amount of energy per tick. The sun adds a fixed energy per tick.
• Each environment grid cube acts as a single point and each connected pipe network acts as a single point.
• Insulation is perfect/infinite.
• All pumps/mixer also act as a check valve.
• Gas stoichiometry is utilized. (i.e. Igniting 2H₂ + O₂ yields H₂O instead of expected 2H₂O)