Key points are not available for this paper at this time.
The authors derive general formulae for the computation of the thermodynamic properties of a partially ionized (and/or dissociated) multicomponent gas in terms of second derivatives of the free energy with respect to temperature, volume, and occupation numbers. For the free energy used in previous work the authors give explicit analytical expressions for all derivatives required to construct the thermodynamic quantities. Representative results for several different thermodynamic properties of a hydrogen-helium plasma with N(He)/N(H) = 0.10 are presented as color plots.
Daêppen et al. (1988) studied this question.