Diffusion coefficient of hydrogen atoms and molecules from accurate spherically averaged H-H₂ interaction potentials

Abstract

Binary diffusion coefficients of atomic and molecular hydrogen have been calculated from the collision integrals using spherically averaged H-H₂ interaction potentials which come from the analysis of recent molecular beam experiments and from accurate ab initio calculations, and differ significantly from those previously used in the transport studies. The new diffusion data from the various potentials are compared and found to lie between the direct measurements of Khouw et al. and those of Sancier and Wise. Estimates of the viscosity coefficient η₁₂ from the potentials used in the present work are also presented and found to agree best with the early experimental values of Browning and Fox.

The results of the present work were presented at the 4th Annual Meeting of the Portuguese Chemical Society, Lisbon, April 1981.

The results of the present work were presented at the 4th Annual Meeting of the Portuguese Chemical Society, Lisbon, April 1981.

Notes

The results of the present work were presented at the 4th Annual Meeting of the Portuguese Chemical Society, Lisbon, April 1981.