Abstract
Thermodynamic properties such as enthalpy and specific heat, and viscosity of different compositions of argon-iron mixture gases are calculated under the assumption of local thermal equilibrium for a temperature range of 2, 500K to 30, 000K. The enthalpy decreases basically with increasing iron vapor content, however increases in the temperature range between 5, 000 and 14, 000K due to the ionization of iron atoms around 7, 000K. The specific heat changes complexly with temperature having several peaks corresponding to the ionization of iron and argon atoms and their ions. The viscosity decreases with increasing iron vapor content above the temperature range of 6, 000K due to the iron ions, which have a relatively large coulombic cross section. Increasing pressure causes the enthalpy to be decreased, however the viscosity to be increased. This result comes from the upward shift of temperature region in which the ionization reactions proceed efficiently.
