Gas

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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 (J)	Latent Heat (kJ)	Solid Temperature (°K/°C)	Boiling Point at 100KPa	Minimum Condensation	Maximum Liquid Temperature
Carbon Dioxide (CO2)	Gray	28.2	0.6	218 / -55.3	N/A.	517kPa at 218K°/-55.3C°	265K°/-8.1C° at 6000KPa
Nitrogen (N2)	Black	20.6	0.5	40 / -233	75K°/-198C°	6.3kPa at 40K°/233C°	190K°/-83C° at 6000kPa
Nitrous Oxide (N2O)	Green	37.2	4	252 / -21	N/A	800KPa at 252K°/-21C°	431K/158C° at 2000kPa
Oxygen (O2)	White	21.1	0.8	56.4 / -217	90K°/-183C°	6.3kPa at 56.4K/-217 C°	162k°/-111C° at 6000kPa
Pollutant (X)	Yellow	24.8	2	173 / -99.8	N/A	1800kPa at 173K°/-99.8C°	425K°/152C° at 6000kPa
Volatiles (H2)	Red	20.4	1	81.6 / -192	112K°/-162C°	6.3kPa at 81.6K°/-192C°	195K°/-78.1C° at 6000kPa
Water (H20)	Blue	72	8	273 / 0	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 .}

^{* the following exist only in solid state and have no gaseous form: Charcoal, Coal, Silicon, Iron, Copper, Nickel, Silver, Gold, Lead, Uranium}

Mixtures

Name	Contents	Tank Color	Notes
Fuel	67% H2, 33%O2	Orange	Autoignition at 573.15K°/300C°
HydroNox	50%H2, 50%N2O	N/A.	Autoignition at 323.15K°/50C°
Air	75% N2, 25% O2	White	16kPa Partial Pressure O2 minimum is required for human player breathing. Hyperoxia is not simulated.

Simulation Mechanics

• Ideal gas law (PV=nRT) is simulated.
• Thermal conductivity is not simulated. (f.e. heat is transferred at the same fixed rate for all substances; structures and devices are ignored)
• Thermal radiation is simulated. (caveat: radiated infrared is not absorbed by nearby objects)
• Phase change is simulated. (caveat: simplified and with fixed temperature for solid state)
• Fluid dynamics are not simulated. (caveat: thermal convection is partially simulated)
• Each environment grid cube acts as a single point and each connected pipe network acts as a single point.
• All pumps/mixer also act as a check valve.
• Gas stoichiometry is partially utilized. Some reactions do not reflect real-life.
• Gas pressure determines liquid pressure; gravity/height is ignored.
• Pipes have arbitrary stress value determined by amount of non-correct phase of substance within them (liquid in a gas pipe).
• [bug?] Liquid temperature is controlled by gas temperature. (if no gas present, liquid heater will not function)