VIBRATIONAL RELAXATION IN CARBON DIOXIDE/WATER-VAPOR MIXTURES.
MISSISSIPPI UNIV UNIVERSITY
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Sound-absorption and -velocity measurements in carbon dioxide water-vapor mixtures were made over the temperature range 23-195C. The measurements were made using plane progressive waves inside a glass tube 1.73 cm in diameter. Values of the mixture relaxation time obtained from the data increase from 0.27X10 to the -8th power sec at 23C to 0.58X10 to the -8th power sec at 195C, displaying no minimum value as has been reported previously by other authors. The collision efficiency decreases slightly over this temperature range. Values of an average collision diameter calculated from the experimental data are in good agreement with values predicted by the Widom-Bauer theory, the basis of which is a chemical affinity between the CO2 and H2O molecules. Author
- Physical Chemistry