1210. A modified type of thermal-diffusion cell, and its application to the measurement of Soret coefficients for solutions of carbon tetrachloride in benzene

L. Guczi, H. J V Tyrrell

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The principles underlying the design of a satisfactory cell for the direct study of the Soret effect are discussed, and an improved cell, suitable for use with most non-aqueous mixtures, is described. It has been used, in conjunction with a phase-contrast schlieren technique of measuring refractive index gradients, to study thermal diffusion in some solutions of carbon tetrachloride in benzene at a mean temperature of 25. The results confirm that carbon tetrachloride migrates to the cold wall, the average Soret coefficient (σ) for an equimolar solution being 6.40 × deg.-1, a figure based on 49 separate values obtained in four independent experiments (standard deviation = 0.08 × 10-3 deg.-1). The coefficient varies only slightly with concentration down to N(CCl4) = 0.2, though some preliminary measurements at lower mole fractions suggest that σ may rise rapidly as the system becomes richer in benzene.

Original languageEnglish
Pages (from-to)6576-6586
Number of pages11
JournalJournal of the Chemical Society (Resumed)
DOIs
Publication statusPublished - 1965

Fingerprint

Thermal Diffusion
Thermal diffusion
Carbon Tetrachloride
Benzene
Refractometry
Refractive index
Temperature
Experiments

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

@article{fdd7698c45754590bbaf701388d24097,
title = "1210. A modified type of thermal-diffusion cell, and its application to the measurement of Soret coefficients for solutions of carbon tetrachloride in benzene",
abstract = "The principles underlying the design of a satisfactory cell for the direct study of the Soret effect are discussed, and an improved cell, suitable for use with most non-aqueous mixtures, is described. It has been used, in conjunction with a phase-contrast schlieren technique of measuring refractive index gradients, to study thermal diffusion in some solutions of carbon tetrachloride in benzene at a mean temperature of 25. The results confirm that carbon tetrachloride migrates to the cold wall, the average Soret coefficient (σ) for an equimolar solution being 6.40 × deg.-1, a figure based on 49 separate values obtained in four independent experiments (standard deviation = 0.08 × 10-3 deg.-1). The coefficient varies only slightly with concentration down to N(CCl4) = 0.2, though some preliminary measurements at lower mole fractions suggest that σ may rise rapidly as the system becomes richer in benzene.",
author = "L. Guczi and Tyrrell, {H. J V}",
year = "1965",
doi = "10.1039/JR9650006576",
language = "English",
pages = "6576--6586",
journal = "Journal of the Chemical Society",
issn = "0368-1769",
publisher = "Chemical Society",

}

TY - JOUR

T1 - 1210. A modified type of thermal-diffusion cell, and its application to the measurement of Soret coefficients for solutions of carbon tetrachloride in benzene

AU - Guczi, L.

AU - Tyrrell, H. J V

PY - 1965

Y1 - 1965

N2 - The principles underlying the design of a satisfactory cell for the direct study of the Soret effect are discussed, and an improved cell, suitable for use with most non-aqueous mixtures, is described. It has been used, in conjunction with a phase-contrast schlieren technique of measuring refractive index gradients, to study thermal diffusion in some solutions of carbon tetrachloride in benzene at a mean temperature of 25. The results confirm that carbon tetrachloride migrates to the cold wall, the average Soret coefficient (σ) for an equimolar solution being 6.40 × deg.-1, a figure based on 49 separate values obtained in four independent experiments (standard deviation = 0.08 × 10-3 deg.-1). The coefficient varies only slightly with concentration down to N(CCl4) = 0.2, though some preliminary measurements at lower mole fractions suggest that σ may rise rapidly as the system becomes richer in benzene.

AB - The principles underlying the design of a satisfactory cell for the direct study of the Soret effect are discussed, and an improved cell, suitable for use with most non-aqueous mixtures, is described. It has been used, in conjunction with a phase-contrast schlieren technique of measuring refractive index gradients, to study thermal diffusion in some solutions of carbon tetrachloride in benzene at a mean temperature of 25. The results confirm that carbon tetrachloride migrates to the cold wall, the average Soret coefficient (σ) for an equimolar solution being 6.40 × deg.-1, a figure based on 49 separate values obtained in four independent experiments (standard deviation = 0.08 × 10-3 deg.-1). The coefficient varies only slightly with concentration down to N(CCl4) = 0.2, though some preliminary measurements at lower mole fractions suggest that σ may rise rapidly as the system becomes richer in benzene.

UR - http://www.scopus.com/inward/record.url?scp=37049055380&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37049055380&partnerID=8YFLogxK

U2 - 10.1039/JR9650006576

DO - 10.1039/JR9650006576

M3 - Article

AN - SCOPUS:37049055380

SP - 6576

EP - 6586

JO - Journal of the Chemical Society

JF - Journal of the Chemical Society

SN - 0368-1769

ER -