Actions for THERMAL DIFFUSION IN NON-AQUEOUS SOLUTIONS (THE BENZENE-CYCLOHEXANE SYSTEM AT 25) (thesis).

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THERMAL DIFFUSION IN NON-AQUEOUS SOLUTIONS (THE BENZENE-CYCLOHEXANE SYSTEM AT 25) (thesis).

Author
Payton, Jr, A. D.
Published
United States : [publisher not identified], 1960.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1960.
Physical Description
microopaque : positive ; 8 x 13 cm

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Summary
Thermal diffusion in the benzene--cyclohexane system was studied utilizing the pure Soret effect. The results compare qualitatively with the most reliable of the present theories for prediction of Soret coefficients. A Rayleigh interferometer and a Soret cell made of glass and silver were employed. Other phenomenological theories for the time-dependent and steady-state Soret diffusion experiments were reviewed. New phenomenological equations are presented for the isothermal decay of the mole fraction gradient present in the steady state. Experiments were performed on an aqueous potassium chloride solution and a solution of n-heptane in benzene. The results on the latter solution are again lower than the theoretical values, but literature values for the Soret coefficient snd the theoretical values are in qualitative agreement. The results on the potassium chloride solution agree well with the literature values. The three parts of the complete experiment, the time-dependent run, the steady-state run, and the isotherraal-decay rum, provide an excellent check on the self-consistency of the experiment. For these two solutions, the first two parts agree to one per cent snd the last part agrees with the first two within eight per cent. Diffusion coefficients, obtained from the first and last parts, are in fair agreement with the literature values. Some experiments were carried out in a new differential refractometer to determine the change of refractive index with mole fraction for non-aqueous solutions. necessary for the calculation of Soret coefficients. This instrument is based on a principle not utilized in conventional differential refractometers. (auth)
Report Numbers
TID-5970
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: AT(30-1)-1375
NSA number: NSA-14-016580
OSTI Identifier 4181611
Research organization: Yale Univ., New Haven.
View MARC record | catkey: 42247445