The ax state deserve to be characterized as a set of conditionsthat explain a person or point at a offered time. The is in thissense of words that scientists divide matter right into the 3 statesshown in the number below.




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The three claims of matter have characteristic properties. Solids have actually a distinct shape. As soon as they melt, the resulting liquid conforms to the shape of the container. Gases expand to fill their containers.

There room two factors for examining gases before liquids orsolids. First, the habits of gases is much easier to describebecause many of the properties of gases do not depend on theidentity the the gas. Us can thus develop a model for a gaswithout worrying around whether the gas is O2, N2,H2, or a mixture of this gases. Second, a relativelysimple, however powerful, model well-known as the kinetic moleculartheory is available, which defines most that the habits ofgases.

Elements orcompounds that space Gases in ~ Room Temperature

Before assessing the jajalger2018.orgical and physical nature ofgases, it could be useful to ask: What type of facets orcompounds space gases in ~ room temperature? To aid answer thisquestion, a list of some common compounds that are gases in ~ roomtemperature is provided in the table below.

Common Gases at Room Temperature




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Element or link Atomic or Molecular load
H2 (hydrogen) 2.02
He (helium) 4.00
CH4 (methane) 16.04
NH3 (ammonia) 17.03
Ne (neon) 20.18
HCN (hydrogen cyanide) 27.03
CO (carbon monoxide) 28.01
N2 (nitrogen) 28.01
NO (nitrogen oxide) 30.01
C2H6 (ethane) 30.07
O2 (oxygen) 32.00
PH3 (phosphine) 34.00
H2S (hydrogen sulfide) 34.08
HCl (hydrogen chloride) 36.46
F2 (fluorine) 38.00
Ar (argon) 39.95
CO2 (carbon dioxide) 44.01
N2O (dinitrogen oxide) 44.01
C3H8 (propane) 44.10
NO2 (nitrogen dioxide) 46.01
O3 (ozone) 48.00
C4H10 (butane) 58.12
SO2 (sulfur dioxide) 64.06
BF3 (boron trifluoride) 67.80
Cl2 (chlorine) 70.91
Kr (krypton) 83.80
CF2Cl2 (dichlorodifluoromethane) 120.91
SF6 (sulfur hexafluoride) 146.05
Xe (xenon) 131.30

There are numerous patterns in the table above.

typical gases at room temperature include both aspects (such together H2 and O2) and compounds (such as CO2 and NH3). facets that room gases at room temperature room all nonmetals (such together He, Ar, N2, O2, and so on). Link that room gases at room temperature space all covalent compounds (such as CO2, SO2, and NH3) the contain 2 or much more nonmetals. With only rare exception, these gases have relatively small molecule weights.

As a basic rule, compounds that consist of fairly light,covalent molecules are most most likely to be gases in ~ roomtemperature.