Limiting Partial Molar Excess Enthalpies of Selected Organic Compounds in Water at 298.15 K

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F02%3A00006996" target="_blank" >RIV/60461373:22340/02:00006996 - 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

Limiting Partial Molar Excess Enthalpies of Selected Organic Compounds in Water at 298.15 K

Popis výsledku v původním jazyce

A flow mixing microcalorimeter in conjunction with asymmetric syringe-type pumps was employed to measure enthalpies of mixing at 298.15 K for highly dilute aqueous solutions of 16 organic solvents of moderate hydrophobicity. Limiting partial molar excessenthalpies were determined by extrapolating these data to infinite dilution. Except for 2,4-pentanedione, the values of limiting partial molar excess enthalpies for all the examined mono- and bi-functional compounds containing hydroxy, keto, ether, ester, and nitrile groups are negative, indicating that the process of their dissolution in water is energetically favored at room temperature. Comparison with available literature data showed good agreement. Prediction of limiting partial molar excess enthalpies was tested for two group-contribution methods: that of Cabani et al. was found to be fairly good for monofunctional derivatives, but failed for the bifunctional derivatives, and the modified UNIFAC (Dortmund) yielded completely unsa

Název v anglickém jazyce

Limiting Partial Molar Excess Enthalpies of Selected Organic Compounds in Water at 298.15 K

Popis výsledku anglicky

A flow mixing microcalorimeter in conjunction with asymmetric syringe-type pumps was employed to measure enthalpies of mixing at 298.15 K for highly dilute aqueous solutions of 16 organic solvents of moderate hydrophobicity. Limiting partial molar excessenthalpies were determined by extrapolating these data to infinite dilution. Except for 2,4-pentanedione, the values of limiting partial molar excess enthalpies for all the examined mono- and bi-functional compounds containing hydroxy, keto, ether, ester, and nitrile groups are negative, indicating that the process of their dissolution in water is energetically favored at room temperature. Comparison with available literature data showed good agreement. Prediction of limiting partial molar excess enthalpies was tested for two group-contribution methods: that of Cabani et al. was found to be fairly good for monofunctional derivatives, but failed for the bifunctional derivatives, and the modified UNIFAC (Dortmund) yielded completely unsa

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

Journal of Chemical and Engineering Data

ISSN

0021-9568

e-ISSN

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Svazek periodika

47

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

954-959

Kód UT WoS článku

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EID výsledku v databázi Scopus

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