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

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.