scholarly journals Critical Comments on “Assessment of the Thermodynamic Properties of DL-p-Mentha-1,8-diene, 4-Isopropyl-1-Methylcyclohexene (DL-Limonene) by Inverse Gas Chromatography (IGC)”

2020 ◽  
Vol 58 (5) ◽  
pp. 401-402
Author(s):  
William E Acree
Keyword(s):  
Gas Chromatography ◽  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Inverse Gas Chromatography ◽  
Thermodynamic Quantities ◽  
Pressure Measurements ◽  
Probe Molecules ◽  
Vapor Pressure Measurements ◽  
Published Paper ◽  
Heats Of Vaporization

Abstract A polemic is given regarding the calculated thermodynamic quantities reported in the published paper by Farschi and coworkers. The graph used to calculate the molar heat of sorption of organic probe molecules onto the liquid DL-limonene stationary phase erroneously plots the reciprocal of the centigrade temperatures, rather than the reciprocal of the Kelvin temperatures. Molar heats of vaporization of the organic probe molecules reported in the paper are abnormally small and are not in accord with published values determined from calorimetric and vapor pressure measurements.

Heats of vaporization of monoalkylcyclohexanes by the gas chromatography – calorimetry method

1978 ◽  
Vol 56 (19) ◽  
pp. 2493-2498 ◽  
Author(s):  
Richard Fuchs ◽  
L. Alan Peacock
Keyword(s):  
Gas Chromatography ◽  
Vapor Pressure ◽  
Stationary Phase ◽  
Empirical Method ◽  
Side Chains ◽  
Pressure Measurements ◽  
Heats Of Solution ◽  
Vapor Pressure Measurements ◽  
Heats Of Vaporization ◽  
Good Agreement

A recently developed empirical method for measuring beats of vaporization (ΔHv25) by a combination of gas chromatography and calorimetric heats of solution in the stationary phase has been applied to a series of 9 monoalkylcyclohexanes having C1–C12 side chains. The uncertainties in the measurements (0.07 – 0.23 kcal/mol) are critically evaluated. Comparison with literature ΔHv measurements indicates good agreement for low boiling compounds, and for high boiling compounds, values substantially more reliable than were previously obtained from vapor pressure measurements.

Some Thermodynamic Properties of the Dimethylsulfoxide–Water and Propylene Carbonate–Water Systems at 25 °C

1974 ◽  
Vol 52 (5) ◽  
pp. 718-722 ◽  
Author(s):  
S. Y. Lam ◽  
R. L. Benoit
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Propylene Carbonate ◽  
Water Systems ◽  
Pressure Measurements ◽  
Free Energies ◽  
Carbonate Water ◽  
Enthalpies Of Mixing ◽  
Molar Excess ◽  
Vapor Pressure Measurements

Molar excess free energies of the systems dimethylsulfoxide–water and propylene carbonate–water have been calculated from static vapor pressure measurements at 25 °C. Enthalpies of mixing at low water concentrations have also been determined. Possible association interactions in these systems are discussed.

ChemInform Abstract: Vapor-Pressure Measurements and Thermodynamic Properties: 1,3,5-Tribromobenzene

ChemInform ◽  
1988 ◽  
Vol 19 (26) ◽  
Author(s):  
J. HUININK ◽  
J. C. VAN MILTENBURG ◽  
H. A. J. OONK ◽  
A. SCHUIJFF
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Pressure Measurements ◽  
Vapor Pressure Measurements

Some thermodynamic properties of the sulfolane–benzene and sulfolane–dichloromethane systems

1969 ◽  
Vol 47 (22) ◽  
pp. 4195-4198 ◽  
Author(s):  
R. L. Benoit ◽  
J. Charbonneau
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Infinite Dilution ◽  
Partial Molar Volumes ◽  
Refractive Indices ◽  
Pressure Measurements ◽  
Free Energies ◽  
Volumes Of Mixing ◽  
Excess Partial Molar Volumes ◽  
Vapor Pressure Measurements

Molar excess free energies of the systems sulfolane-benzene and sulfolane–dichloromethane have been calculated from static vapor pressure measurements at 30.00 °C. Refractive indices, excess partial molar volumes of mixing, and enthalpies of mixing at infinite dilution of benzene and dichloromethane were also determined.

Thermodynamic Properties ofn-Alkoxyethanols + Organic Solvent Mixtures. XI. Total Vapor Pressure Measurements forn-Hexane, Cyclohexane orn-Heptane + 2-Ethoxyethanol at 303.15 and 323.15 K

2000 ◽  
Vol 45 (4) ◽  
pp. 699-703 ◽  
Author(s):  
F. Javier Carmona ◽  
J. Antonio González ◽  
Isaias García de la Fuente ◽  
José Carlos Cobos ◽  
Venkat R. Bhethanabotla ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Organic Solvent ◽  
Solvent Mixtures ◽  
Pressure Measurements ◽  
Vapor Pressure Measurements

Clarification on “Critical Comments on ‘Assessment of the Thermodynamic Properties of DL-p-Mentha-1,8-diene, 4-isopropyl-1-methylcyclohexene (DL-Limonene) by Inverse Gas Chromatography (IGC)’”

2020 ◽  
Vol 58 (10) ◽  
pp. 896-898
Author(s):  
Negin Farshci ◽  
Ali Abbasian
Keyword(s):  
Gas Chromatography ◽  
Thermodynamic Properties ◽  
Inverse Gas Chromatography ◽  
Complete Data ◽  
Heat Of Vaporization ◽  
Conventional Methods ◽  
Published Paper

Abstract A clarification is given regarding recent polemic over our original published study. The author of this polemic has claimed a few issues about the computations and data listed in our work such as choosing the wrong temperature unit and the incorrect calculation of molar heat of vaporization. Here it is elaborated the complete data and computations that are not included in the original paper, and list out also the parameters, which may be the source of difference in reported molar heat of vaporization through inverse gas chromatography methods and other conventional methods. It is showed that there are no wrong calculations or reports of molar heat of vaporization in our published paper.

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