1996/01/01 by Ping Han, Ping-Hsuan Han, David M. Bartels
Chemistry · Chemical Engineering · #Diffusion Coefficients in Liquids #Adsorption, diffusion, and thermodynamic properties of materials #Thermodynamic properties of mixtures
paper · doi:10.1021/jp952903y
The diffusion coefficient of O 2 in H 2 O and D 2 O has been determined as a function of temperature from −0.5 to 95 °C, using the Taylor dispersion technique with optical absorbance detection at 200 nm. Over this temperature range, significant deviation from both Arrhenius and Stokes−Einstein behavior is found. A practical interpolation formula for the H 2 O solvent is ( T in Kelvin) log 10 [ D /cm 2 s -1 ] = −4.410 + 773.8/ T − (506.4/ T ) 2 and, for the D 2 O solvent, log 10 [ D /cm 2 s -1 ] = −4.706 + 903.6/ T − (526.6/ T ) 2 . As a test of the apparatus, the diffusion coefficient of nitrobenzene in water was carefully measured and found to be 1.04 × 10 -5 cm 2 s -1 at 26 °C and 2.14 × 10 -5 cm 2 s -1 at 60.1 °C.