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Oxygen
| Nitrogen
| Argon
| Hydrogen
| Carbon
Dioxide |
Helium
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1
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Name | ARGON |
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2
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Formula | Ar |
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3
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CAS Number | 7440-37-1 |
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4
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Molecular Weight | 39.948 |
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5
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Melting point | 83.8 K , -189.35 C , -308.83 F |
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6
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Boiling point @ 101.325 kPa (1 atm) | 87.28 K , -185.87 C , -302.57 F |
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7
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Critical Temperature | 150.86 K , -122.29 C , -188.12 F |
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8
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Critical Pressure | 48.98 bar , 48.34 atm , 710.4 psia |
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9
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Critical Volume | 74.59 cm3/mol |
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10
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Critical Density | 0.5356 g/cm3 |
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11
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Critical Compressibility Factor | 0.291 |
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12
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Acentric Factor | 0.000 |
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13
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Density of Liquid @ -140 C | 1.028 g/cm3 |
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14
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Coefficient of thermal Expansion of Liquid @ 25 C | 0.01113 1/C |
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15
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Surface Tension @ -189 C | 13.4 dynes/cm |
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16
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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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17
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Relative Density of Gas @ 1 atm and 70 F (Air =1) | 1.379 |
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18
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Enthalpy of Vaporization @ Boiling Point | 161.21 kJ/kg , 69.32 BTU/lb |
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19
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Enthalpy of Fusion @ Melting Point | 29.59 kJ/kg , 12.72 BTU/lb |
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20
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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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21
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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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22
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Ratio of Heat Capacities for Gas , CP/CV | 1.667 |
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23
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Heat capacity of Liquid @ -173 C | 1.146 kJ/(kg K) , 0.274 BTU/(lb R) |
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24
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Heat capacity of Solid @ -203 C | 0.895 kJ/(kg K ) , 0.214 BTU/(lb R) |
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25
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Entropy of Gas @ 25 C | 154.73 J/(mol K) |
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26
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Entropy of Formation of Gas @ 25 C | 0 J/(mol K) |
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27
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Enthalpy of Formation of Gas @ 25 C | 0 kJ/mol |
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28
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Gibbs Energy of Formation of Gas @ 25 C | 0 kJ/mol |
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29
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Solubility Parameter | 14.138 (J/cm3)^0.5 |
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30
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Liquid Volume | 28.586 cm3/mol |
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31
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Solubility in Water @ 25 C | 54.13 parts per million (wt) |
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32
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Octanol-Water Partition Coefficient , log KOW |
-
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33
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Henry's Law Constant for Compound in Water @ 25 C | 39696.1 atm/mol fraction |
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34
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Viscosity of Gas @ 25 C | 224.42 micropoise |
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35
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Viscosity of Liquid @ -130 C | 0.054 centipoise |
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36
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Thermal Conductivity of Gas @ 25 C | 0.01795 watts/(m K) |
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37
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Thermal Conductivity of Liquid @ -150 C | 0.088 watts/(m K) |
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38
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Lower Explosion Limit in Air |
-
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39
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Upper Explosion Limit in Air |
-
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40
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Flash Point Temperature |
-
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41
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Autoignition Temperature |
-
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42
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Enthalpy of Combustion @ 25 C (77 F) |
-
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43
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Threshold Limit Value (ACGIH) |
-
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44
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Permissible Exposure Limit (OSHA) |
-
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45
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Recommended Exposure Limit (NIOSH) |
-
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