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Title:
DOLOČANJE PROSTE ENERGIJE ALKOHOLOV S POMOČJO KAPILARNE PLINSKE KROMATOGRAFIJE
Authors:
ID
Dolgoš, Arpad
(
Author
)
ID
Petek, Aljana
(
Mentor
)
More about this mentor...
ID
Brodnjak-Vončina, Darinka
(
Comentor
)
Files:
VS_Dolgos_Arpad_2014.pdf
(2,57 MB)
MD5: FC2F13E44E2FFDF9B1ED067603F2DD3E
Language:
Slovenian
Work type:
Undergraduate thesis
Typology:
2.11 - Undergraduate Thesis
Organization:
FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:
Namen našega dela je bil določiti spremembo standardne proste energije alkoholov pri porazdelitvi med mobilno in stacionarno fazo. Vrednosti smo določili na podlagi različnih retencijskih časov alkoholov v homologni vrsti od butan-1-ola do oktan-1-ola in vključno tudi dekan-1-ola. Za merjenje smo uporabili plinski kromatograf s kapilarno kolono. Ugotovili smo linearnost standardne proste energije glede na spremembo temperature kapilarne kolone in tudi linearnost glede na alkohole v homologni vrsti pri konstantni temperaturi. Z merjenjem pri različnih tlakih smo še dokazali, da je termodinamska konstanta ravnotežja neodvisna od tlaka. V samem poteku postopka za izračun standardne proste energije smo dobili še vrednosti za standardno entalpijo in standardno entropijo. Podatke lahko uporabljamo pri simulacijah podobnih separacijskih metod in predvsem v izobraževanju pri področju termodinamike in kemijskega ravnotežja.
Keywords:
prosta energija
,
alkoholi
,
plinska kromatografija
,
kapilarna kolona
,
konstanta porazdelitve
Place of publishing:
Maribor
Publisher:
[A. Dolgoš]
Year of publishing:
2014
PID:
20.500.12556/DKUM-46583
UDC:
543.544.3:544(043.2)
COBISS.SI-ID:
18297878
NUK URN:
URN:SI:UM:DK:4JVP4VWJ
Publication date in DKUM:
27.10.2014
Views:
2509
Downloads:
283
Metadata:
Categories:
KTFMB - FKKT
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Secondary language
Language:
English
Title:
DETERMINATION OF FREE ENERGY OF ALCOHOLS USING CAPILLARY GAS CHROMATOGRAPHY
Abstract:
The aim of our work was to determine the change of the standard free energy of alcohols in the distribution between the mobile and stationary phase. Values were determined based on different retention times of a homologous series of alcohols from butan-1-ol to octan-1-ol, and including also decan-1-ol. For measurements, we used a gas chromatograph with a capillary column. We have found the linearity of the standard free energy according to the change of temperature of the capillary column and the linearity with respect to the homologous series of alcohols at a constant temperature. By measuring at different pressures, we have shown that the thermodynamic equilibrium constant is independent of pressure. In the course of the procedure for the calculation of the standard free energy, we have defined other standard enthalpy and standard entropy values. The data can be used to simulate similar separation methods, and in particular in education in the field of thermodynamics and chemical equilibrium.
Keywords:
free energy
,
alcohols
,
gas chromatography
,
capillary column
,
distribution coefficient
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