Gas

This article contains outdated information that is inaccurate for the current version. It was last updated for LU-356355. Unreflected changes in the discussed game mechanics are detailed here: EX1-444349

This article contains outdated information that is inaccurate for the current version. It was last updated for LU-356355. Unreflected changes in the discussed game mechanics are detailed here: EX1-444349

Gases are substances that expand to fill their container.

coal

Mechanics[ | ]

• Gases will condense into a liquid if cooled 3 °C under their condensation point. The same, liquids will evaporate if heated up 3 °C above their condensation point.
• Unlike liquids, gases will always spread to nearby vacuum tiles (unless less than 1 microgram of the gas is present).
• Elements with a lower density tend to rise above others. In the case of gases with the same density (e.g. Oxygen and Polluted Oxygen), they tend to group together and form different layers.
• There are heat convection mechanics. The heated gasses will rise upwards, while the colder gasses will be pushed down, the gasses with similar temperatures tend to semi-randomly spread horizontally.
• Duplicants can breathe Oxygen and Polluted Oxygen.
• Unless specified, Critters do not breathe, and may survive in any gas as long as other conditions are met.
  • They can also survive in a vacuum.
  • Airborn Critters can fly/float in a vacuum.
• Gases will be destroyed when exposed to space, unless protected by Drywall.
• Gas can be stored in a Gas Reservoir.
• Duplicants can be scalded by hot Gases like Steam. Wearing an Atmo Suit will protect them.

List of Gases[ | ]

Gases tend to stratify (separate by height) as follows, from lightest to heaviest:

Icon	Name	Description	Condensation point °C	Condensate into	SHC	TC	Weight molar mass (u)	Light Absortion %
	Hydrogen	(H) Hydrogen is the universe's most common and atomically light element in a Gaseous state.	-252.15	Liquid Hydrogen	2.400	0.168	1.00794	10
	Helium (unused)	(He) Helium is an atomically lightweight, chemical Gas.	-268.93	Liquid Helium	0.140	0.236	4	10
	Gas Carbon	(C) Carbon is an abundant, versatile element heated into a Gaseous state.	4826.85	Liquid Carbon	0.710	1.700	12.0107	30
	Polluted Oxygen	(O2) Polluted Oxygen is dirty, unfiltered air. It is breathable.	-182.96	Liquid Oxygen	1.010	0.024	15.9994	10
	Oxygen	(O2) Oxygen is an atomically lightweight and breathable Gas, necessary for sustaining life. It tends to rise above other gases.	-182.96	Liquid Oxygen	1.005	0.024	15.9994	0
	Natural Gas	Natural Gas is a mixture of various alkanes in a Gaseous state. It is useful in Power production.	-161.5	Methane	2.191	0.035	16.044	25
	Steam	(H2O) Steam is a water that has been heated into a scalding Gas.	99.35	Water	4.179	0.184	18.01528	10
	Sour Gas	Sour Gas is a hydrocarbon Gas containing high concentrations of hydrogen sulfide. It is a byproduct of highly heated Petroleum.	-161.5	Methane	1.898	0.018	19.044	25
	Gas Phosphorus	(P) Phosphorus is a chemical element in a Gaseous state.	280.45	Liquid Phosphorus	0.770	0.236	30.973762	50
	Gas Sulfur	(S) Sulfur is a common chemical element and byproduct of Natural Gas production. This selection is in a Gaseous state.	337	Liquid Sulfur	0.700	0.200	32	10
	Chlorine	(Cl) Chlorine is an extremely toxic chemical in a Gaseous state.	-34.6	Liquid Chlorine	0.480	0.008	34.453	20
	Carbon Dioxide	(CO2) Carbon Dioxide toxic, atomically heavy chemical compound in a Gaseous state. It tends to sink below other gases.	-48.15	Liquid Carbon Dioxide	0.846	0.015	44.01	10
	Propane (unused)	(C3H8) Propane is a natural alkane Gas. It is useful in Power production.	-42.15	Liquid Propane	2.400	0.015	44.1	25
	Gas Ethanol	(C2H5OH) Ethanol is a high toxic chemical compound. It can be used as highly effective fuel source when it's burned.	78.35	Ethanol	2.148	0.167	46.07	50
	Rock Gas	Rock Gas is rock that has been superheated into a Gaseous state.	2356.85	Magma	1.000	0.100	50	50
	Salt Gas	(NaCl) Salt Gas is an edible chemical compound that has been superheated into a Gaseous state.	1464.85	Molten Salt	0.880	0.444	50	10
	Gas Steel	Steel is a superheated Metal Gas composed of iron and carbon.	3826.85	Liquid Steel	0.490	1.000	54.97	50
	Gas Iron	(Fe) Iron is a common industrial Metal, heated into a Gas.	2749.85	Liquid Iron	0.449	1.000	55.845	50
	Gas Copper	(Cu) Copper is a conductive Metal heated into a Gas.	2560.85	Liquid Copper	0.386	1.000	63.546	50
	Gas Aluminum	(Al) Aluminum is a low density Metal.	2470	Molten Aluminum	0.910	2.500	63.546	50
	Gas Niobium	(Nb) Niobium is a Rare Metal. This selection is in a Gaseous state.	4743.85	Liquid Niobium	0.265	1.000	92.9	50
	Gas Tungsten	(W) Tungsten is a superheated crystalline Metal. This selection is in a Gaseous state.	5929.85	Liquid Tungsten	0.134	1.000	183.84	50
	Gas Super Coolant	Super Coolant is an industrial grade Fullerene coolant. This selection is in a Gaseous state.	436.85	Super Coolant	8.440	1.200	190	50
	Gas Gold	(Au) Gold is a conductive precious Metal, heated into a Gas.	2855.85	Liquid Gold	0.129	1.000	196.966569	50
	Gas Lead	(Pb) Lead is a soft yet extremely dense Refined Metal.	1749	Molten Lead	0.128	3.500	196.966569	50
	Gas Mercury (unused)	(Hg) Mercury is a toxic Metal heated into a Gaseous state.	356.75	Mercury	0.140	8.300	200.59	50
	Nuclear Fallout	TBD	66.9	Nuclear Waste	0.265	1.000	92.9	50
	Gas Cobalt	(Co) Cobalt is an industrial Metal, heated into a Gas.	2926.9	Liquid Cobalt	0.420	1.000	58.9	50

Trivia[ | ]

• Real-life oxygen has a "density" (molecular mass) of about 32 g/mol, as there are two oxygen atoms of 16 mass each.