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Propane
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Propane

   

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Properties
General
Name Propane
Lewis Structure:
  H H H
  | | | 
H-C-C-C-H
  | | |
  H H H
Chemical formula CH3CH2CH3 or C3H8
Formula weight 44.10 amu
Synonyms Dimethylmethane, LPG
CAS number 74-98-6
UN number 1978
Phase behavior
Melting point 85.5 K (-187.6°C;)
Boiling point 231.1 K (-42°C)
Triple point 85 K (-188°C)
1.69E-09 bar
Critical point 369.9 K (96.9°C)
42.5 bar
ΔsubH; 28.5 kJ/mol
ΔfusH; 3.52 kJ/mol
ΔfusS; J/mol·K
ΔvapH; 19.4 kJ/mol
Solubility 0.01 g/100ml
Liquid properties
ΔfH0liquid; -120 kJ/mol
S0liquid 171 J/mol·K
Cp 98.3 J/mol·K
Density 0.582 ×103 kg/m3
Gas properties
ΔfH0gas; -105 kJ/mol
S0gas ? J/mol·K
Cp 73.6 J/mol·K
Safety'
Ingestion Nausea, vomiting, internal hemorrhage.
Inhalation Rapid breathing & heart rate. Headaches, mood disturbance, conufsion and seisures may occur. Danger of cardiac arrest in severe cases.
Skin (Frostbite on exposure to cryogenic liquid)
Flash point -104°C
Autoignition temperature 450°C
Explosive limits 2.1-9.5%
More info
Properties NIST WebBook
MSDS Hazardous Chemical Database
SI units were used where possible. Unless otherwise stated, standard conditions were used.

Disclaimer and references

A three-carbon alkane, propane is sometimes derived from other petroleum products during oil or natural gas processing.

When commonly sold as fuel, it is also known as liquified petroleum gas (LPG or LP gas) and is a mixture of propane with smaller amounts of propylene, butane and butylene, plus an ethyl mercaptan odorant to allow the normally odorless propane to be smelled. It is used as fuel in cooking on many barbecues and portable stoves and in motor vehicles. Propane powers some buses, forklifts, and taxis and is used for heat and cooking in recreational vehicles and campers. In many rural areas of the US, propane is also used in furnaces, water heaters, laundry dryers, and other heat-producing appliances. Delivery trucks fill up large tanks that are permanently installed on the property (sometimes called pigs) or exchange bottles of propane.

Another use of propane is the application as propellant for aerosol sprays, especially after the ban of CFCs.

See also

Alkanes
  methane
CH4
|
 
ethane
C2H6
|
 
propane
C3H8
|
 
butane
C4H10
|
 
pentane
C5H12
|
 
hexane
C6H14
|
 
heptane
C7H16
|
 
octane
C8H18
|
 
nonane
C9H20
|
 
decane
C10H22
|
 
undecane
C11H24