High-temperature transport properties (viscosity, thermal conductivity, binary and multicomponent mass diffusion, and thermal diffusion) of dissociating gases of the Earth and Martian atmospheres have been calculated within the framework of the Chapman-Enskog method. The different models of interactions betwen atoms (N, O, and C) and molecules (N_2, O_2, NO, C_2, CN, CO, and CO_2) were studied. The collision cross sections were calculated from numerous experimental molecular-beam scattering data. The bifurcation approximation to the binary diffusion coefficients and the Wike-Saxena approximate techniques were effectively used to simplify numerical algorithms of heat transfer calculations.
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