Determination of temperature dependence of limiting activity coefficients for a group of moderately hydrophobic organic solutes in water

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F02%3A00006995" target="_blank" >RIV/60461373:22340/02:00006995 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Determination of temperature dependence of limiting activity coefficients for a group of moderately hydrophobic organic solutes in water

Popis výsledku v původním jazyce

Limiting activity coefficients in water were measured for 17 moderately hydrophobic compounds at several temperatures. Three experimental techniques, viz. Rayleigh distillation, IGS, and HSA, were alternatively employed. With the objective to establish the reliable temperature dependence of limiting activity coefficient, the activity coefficient values were combined with calorimetric data determined previously in our laboratories. This database was further supplemented with critically evaluated literature data. The 3-parameter equation assuming temperature independent heat capacity was found to represent available information adequately except for 1-butanol. For all the solutes, activity coefficient temperature dependence exhibits a maximum between 273and 373 K. As shown, by processing simultaneously the equilibrium and thermal data, consistent and accurate temperature dependence of activity coefficient can be obtained for the range 273 - 373 K even in cases of minimum underlying info

Název v anglickém jazyce

Determination of temperature dependence of limiting activity coefficients for a group of moderately hydrophobic organic solutes in water

Popis výsledku anglicky

Limiting activity coefficients in water were measured for 17 moderately hydrophobic compounds at several temperatures. Three experimental techniques, viz. Rayleigh distillation, IGS, and HSA, were alternatively employed. With the objective to establish the reliable temperature dependence of limiting activity coefficient, the activity coefficient values were combined with calorimetric data determined previously in our laboratories. This database was further supplemented with critically evaluated literature data. The 3-parameter equation assuming temperature independent heat capacity was found to represent available information adequately except for 1-butanol. For all the solutes, activity coefficient temperature dependence exhibits a maximum between 273and 373 K. As shown, by processing simultaneously the equilibrium and thermal data, consistent and accurate temperature dependence of activity coefficient can be obtained for the range 273 - 373 K even in cases of minimum underlying info

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Fluid Phase Equilibria

ISSN

0378-3812

e-ISSN

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Svazek periodika

201

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

30

Strana od-do

135-164

Kód UT WoS článku

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EID výsledku v databázi Scopus

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