Argon - Thermophysical Properties

Calculator for argon thermophysical properties. Contains standard reference values for molecular weight, density, viscosity, thermal conductivity, specific heat, and critical point data.

Argon - Thermophysical Properties

Argon is a noble gas with unique thermophysical properties. This calculator provides standard reference values for argon at various conditions.

Key Properties

Chemical Symbol: Ar
Molecular Weight: 39.948
State at STP: Gas
Flammable: No

Calculator

Inputs

Molecular Weight (g/mol)

Specific Gravity

Specific Volume (m³/kg)

Liquid Density at Atmospheric Pressure (kg/m³)

Absolute Viscosity (cP)

Sound Velocity in Gas (m/s)

Specific Heat (cp) (J/kgK)

Specific Heat Ratio (cp/cv)

Gas Constant (R) (J/kg°C)

Thermal Conductivity (W/m°C)

Boiling Point (°C)

Latent Heat of Evaporation at Boiling Point (J/kg)

Freezing/Melting Point at 1 atm (°C)

Critical Temperature (°C)

Critical Pressure (MPa)

Critical Volume (m³/kg)

Results

Molar Mass-- g/mol

Gas Density (calculated from specific volume)-- kg/m³

Critical Temperature (absolute)-- K

Boiling Point (absolute)-- K

Property	Value	Unit (SI)	Unit (Imperial)
Molecular Weight	39.948	g/mol
Specific Gravity	1.38	-	-
Specific Volume	0.622	m³/kg	9.8 ft³/lb
Liquid Density at 1 atm	1400	kg/m³	87.0 lb/ft³
Absolute Viscosity	0.02	cP	13.4×10⁻⁶ lbm/ft·s
Sound Velocity in Gas	322	m/s	-
Specific Heat (cp)	523	J/kgK	0.125 Btu/lb·°F
Specific Heat Ratio (cp/cv)	1.67	-	-
Gas Constant (R)	208	J/kg·°C	38.7 ft·lb/lb·°R
Thermal Conductivity	0.0172	W/m·°C	0.0102 Btu/hr·ft·°F
Boiling Point (1 atm)	-186	°C	-303 °F
Melting Point (1 atm)	-189.2	°C	-308.5 °F
Critical Temperature	-122	°C	-187.6 °F
Critical Pressure	4.87	MPa	707 psia
Critical Volume	0.00186	m³/kg	0.0299 ft³/lb
Latent Heat of Evaporation	163000	J/kg	70 Btu/lb
Flammable	No	-	-