Abstract
The concentration diffusion coefficient, D 12, is measured for the equimolar mixtures of Ne-Ar, Ne-Xe, Ne-H2, Xe-H2, H2-N2 and H2-O2 binary gas systems in a two-bulb metal apparatus in the temperature range 0 C to 100 C. These values are compared with the existing data on these systems and with the predictions of the kinetic theory in conjunction with the modified Buckingham exp-six potential. Unlike the thermal diffusion coefficient, with the simple theory it is possible to predict D 12 within a few percent even for systems involving polyatomic gases. The smoothed experimental D 12 values are also used to obtain data for the coefficients of viscosity and thermal conductivity at round temperatures and compositions for these systems.
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Abbreviations
- C t2 :
-
relative amount of a gas in the mixture in the bulb 2 at an instant t
- C ∞2 :
-
relative amount of the same gas in the mixture in the bulb 2 at equilibrium
- D 12 :
-
diffusion coefficient
- X 1 :
-
mole-fraction of the heavier component in the mixture
- η mix :
-
viscosity coefficient
- λ mix :
-
thermal conductivity coefficient
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Nain, V.P.S., Saxena, S.C. Measurement of the concentration diffusion coefficient for Ne-Ar, Ne-Xe, Ne-H2, Xe-H2, H2-N2 and H2-O2 gas systems. Appl. Sci. Res. 23, 121–133 (1971). https://doi.org/10.1007/BF00413191
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DOI: https://doi.org/10.1007/BF00413191