Heat of immersion studies on characterized silicas

A. J. Tyler; J. A.G. Taylor; B. A. Pethica; J. A. Hockey

doi:10.1039/TF9716700483

Heat of immersion studies on characterized silicas

A. J. Tyler, J. A.G. Taylor, B. A. Pethica, J. A. Hockey

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28 Scopus citations

Abstract

A differential wetting calorimeter suitable for measuring heats of immersion of solids in either aqueous solutions or dry organic solvents is described. With this apparatus the heats of immersion of a number of well-characterized Aerosil silicas in both water and benzene have been measured. The heat of immersion of unannealed silicas in water is dependent on the temperature of the wetting process. For annealed silicas this temperature dependence is not always present. These results indicate that the heat of wetting contains terms which reflect disturbances of the liquid layers surrounding the solid. Also, for microporous adsorbents the heats of wetting cannot be reliably expressed in terms of heats per unit area of surface when the area is determined by the B.E.T. method.

Original language	English (US)
Pages (from-to)	483-492
Number of pages	10
Journal	Transactions of the Faraday Society
Volume	67
DOIs	https://doi.org/10.1039/TF9716700483
State	Published - Dec 1 1971
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1039/TF9716700483

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title = "Heat of immersion studies on characterized silicas",

abstract = "A differential wetting calorimeter suitable for measuring heats of immersion of solids in either aqueous solutions or dry organic solvents is described. With this apparatus the heats of immersion of a number of well-characterized Aerosil silicas in both water and benzene have been measured. The heat of immersion of unannealed silicas in water is dependent on the temperature of the wetting process. For annealed silicas this temperature dependence is not always present. These results indicate that the heat of wetting contains terms which reflect disturbances of the liquid layers surrounding the solid. Also, for microporous adsorbents the heats of wetting cannot be reliably expressed in terms of heats per unit area of surface when the area is determined by the B.E.T. method.",

author = "Tyler, {A. J.} and Taylor, {J. A.G.} and Pethica, {B. A.} and Hockey, {J. A.}",

year = "1971",

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doi = "10.1039/TF9716700483",

language = "English (US)",

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journal = "Transactions of the Faraday Society",

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T1 - Heat of immersion studies on characterized silicas

AU - Tyler, A. J.

AU - Taylor, J. A.G.

AU - Pethica, B. A.

AU - Hockey, J. A.

PY - 1971/12/1

Y1 - 1971/12/1

N2 - A differential wetting calorimeter suitable for measuring heats of immersion of solids in either aqueous solutions or dry organic solvents is described. With this apparatus the heats of immersion of a number of well-characterized Aerosil silicas in both water and benzene have been measured. The heat of immersion of unannealed silicas in water is dependent on the temperature of the wetting process. For annealed silicas this temperature dependence is not always present. These results indicate that the heat of wetting contains terms which reflect disturbances of the liquid layers surrounding the solid. Also, for microporous adsorbents the heats of wetting cannot be reliably expressed in terms of heats per unit area of surface when the area is determined by the B.E.T. method.

AB - A differential wetting calorimeter suitable for measuring heats of immersion of solids in either aqueous solutions or dry organic solvents is described. With this apparatus the heats of immersion of a number of well-characterized Aerosil silicas in both water and benzene have been measured. The heat of immersion of unannealed silicas in water is dependent on the temperature of the wetting process. For annealed silicas this temperature dependence is not always present. These results indicate that the heat of wetting contains terms which reflect disturbances of the liquid layers surrounding the solid. Also, for microporous adsorbents the heats of wetting cannot be reliably expressed in terms of heats per unit area of surface when the area is determined by the B.E.T. method.

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Heat of immersion studies on characterized silicas

Abstract

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