Oxygen | Nitrogen | Argon | Hydrogen | Carbon Dioxide | Helium

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Name ARGON
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Formula Ar
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CAS Number 7440-37-1
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Molecular Weight 39.948
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Melting point 83.8 K , -189.35 C , -308.83 F
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Boiling point @ 101.325 kPa (1 atm) 87.28 K , -185.87 C , -302.57 F
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Critical Temperature 150.86 K , -122.29 C , -188.12 F
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Critical Pressure 48.98 bar , 48.34 atm , 710.4 psia
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Critical Volume 74.59 cm3/mol
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Critical Density 0.5356 g/cm3
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Critical Compressibility Factor 0.291
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Acentric Factor 0.000
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Density of Liquid @ -140 C 1.028 g/cm3
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Coefficient of thermal Expansion of Liquid @ 25 C 0.01113 1/C
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Surface Tension @ -189 C 13.4 dynes/cm
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Density of Gas @ 1 atm and 70 F (21.1 C) 1.654 kg/m3 , 0.1033 lb/ft3
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Relative Density of Gas @ 1 atm and 70 F (Air =1) 1.379
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Enthalpy of Vaporization @ Boiling Point 161.21 kJ/kg , 69.32 BTU/lb
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Enthalpy of Fusion @ Melting Point 29.59 kJ/kg , 12.72 BTU/lb
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Heat Capacity of Gas @ 25 C , Constant Pressure (CP) 0.52 kJ/(kg K) , 0.124 BTU/(lb R)
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Heat Capacity of Gas @ 25 C , Constant Volume (CV) 0.312 kJ/(kg K) , 0.075 BTU/(lb R)
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Ratio of Heat Capacities for Gas , CP/CV 1.667
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Heat capacity of Liquid @ -173 C 1.146 kJ/(kg K) , 0.274 BTU/(lb R)
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Heat capacity of Solid @ -203 C 0.895 kJ/(kg K ) , 0.214 BTU/(lb R)
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Entropy of Gas @ 25 C 154.73 J/(mol K)
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Entropy of Formation of Gas @ 25 C 0 J/(mol K)
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Enthalpy of Formation of Gas @ 25 C 0 kJ/mol
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Gibbs Energy of Formation of Gas @ 25 C 0 kJ/mol
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Solubility Parameter 14.138 (J/cm3)^0.5
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Liquid Volume 28.586 cm3/mol
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Solubility in Water @ 25 C 54.13 parts per million (wt)
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Octanol-Water Partition Coefficient , log KOW
-
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Henry's Law Constant for Compound in Water @ 25 C 39696.1 atm/mol fraction
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Viscosity of Gas @ 25 C 224.42 micropoise
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Viscosity of Liquid @ -130 C 0.054 centipoise
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Thermal Conductivity of Gas @ 25 C 0.01795 watts/(m K)
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Thermal Conductivity of Liquid @ -150 C 0.088 watts/(m K)
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Lower Explosion Limit in Air
-
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Upper Explosion Limit in Air
-
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Flash Point Temperature
-
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Autoignition Temperature
-
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Enthalpy of Combustion @ 25 C (77 F)
-
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Threshold Limit Value (ACGIH)
-
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Permissible Exposure Limit (OSHA)
-
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Recommended Exposure Limit (NIOSH)
-

 

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