Diffusion Coefficients of T2−H2 and T2−D2: The Nonequivalence of the H2 and D2 Cross Sections

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Abstract
Measurements of diffusion in T2−H2 and T2−D2 in three apparatuses of the two‐bulb type are reported at 295.0°K. The ratios of the diffusion cross sections are 1.024±0.014, 1.018±0.011, and 1.015±0.011 in the three apparatuses. This confirms, within mutual experimental error, the observations of Amdur and Beatty (preceding paper). The average diffusion coefficients at 1 atm, corrected to a reduced mass equivalent to H2–H2 diffusion, are 1.441 cm2/sec from the T2−H2 measurements and 1.469 cm2/sec from the T2−D2 measurements.