On the Influence of the Ionization–Recombination Processes on the Hydrogen Plasma Polytropic Index

The polytropic (adiabatic) index for pure hydrogen plasma is analytically calculated as function of reciprocal temperature and degree ionization. Additionally, the graphically represented a density. It concluded that partially ionized cannot be exactly polytropic. deviations from mono-atomic value 5/3 are measurable. analytical result test example how this approach can extended arbitrary gas cocktail.