Two-component monolayers IV. The excess enthalpies and entropies of mixing in the octadecanol-docosyl sulfate system

Bacon K.J. and Barnes G.T. (1978) Two-component monolayers IV. The excess enthalpies and entropies of mixing in the octadecanol-docosyl sulfate system. Journal of Colloid And Interface Science, 67 1: 70-77. doi:10.1016/0021-9797(78)90215-1


Author Bacon K.J.
Barnes G.T.
Title Two-component monolayers IV. The excess enthalpies and entropies of mixing in the octadecanol-docosyl sulfate system
Journal name Journal of Colloid And Interface Science   Check publisher's open access policy
ISSN 0021-9797
Publication date 1978-10-15
Sub-type Article (original research)
DOI 10.1016/0021-9797(78)90215-1
Volume 67
Issue 1
Start page 70
End page 77
Total pages 8
Subject 1505 Marketing
1606 Political Science
3110 Surfaces and Interfaces
Abstract Surface pressure-area isotherms have been determined for the octadecanol-docosyl sulfate monolayer system on 0.1 M potassium chloride solution. Four different temperatures in the range 288 to 318°K and 11 different monolayer compositions were investigated. The Goodrich method was used to calculate the free energies, enthalpies, and entropies of mixing as excesses over the values of the corresponding properties at the lowest observable surface pressure. The small negative values of the excess free energy of mixing thus obtained were found to result from the near cancellation of relatively large contributions from the positive values of the excess enthalpy and the excess entropy. These results are attributed to changes in the hydration of the monolayers during mixing.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Scopus Citation Count Cited 63 times in Scopus Article | Citations
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