Surprising thermodynamic properties of alcohols and water on their coexistence curves

Chechko, V. E.; Gotsulsky, V. Ya.; Malomuzh, N. P.

doi:10.1016/j.molliq.2018.09.126

Cited by 6 publications

(10 citation statements)

References 53 publications

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“…Molecular dipole moments of alcohols from the homologous series of methanol in the gaseous state as a function of their ordinal number . Symbols correspond to experimental data from work [29] temperatures of corresponding states [13,14,31], (panel ) on for primary alcohols. The c-values were taken from work [32].…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…To summarize, in this work, we only have considered the role of hydrogen bonds in alcohols in connection with the behavior of the alcohol density. According to the results of works [13,14], their contribution does not exceed 4% for both methanol and ethanol and should decrease with the growth of the ordinal number of alcohol in the methanol series. We intend to consider this issue elsewhere.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…To interpret the coefficient values in Eq. (4), it is pertinent to use the additive model [12][13][14][15] for the molecular polarizability. According to this model, the polarizability of a molecule can be calculated as the sum of polarizabilities of its fragments,…”

Section: Refractive Indices Of Primary Alcohols From the Methanol Seriesmentioning

confidence: 99%

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Extraordinary Properties of Alcohols from the Homologous Series of Methanol

2020

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Non-trivial properties of thermodynamic quantities such as the density, the critical and triple point temperatures, and their ratio, as well as the optical and dielectric properties, have been analyzed for primary alcohols from the methanol series. The aim is to reveal relationships among their values measured at the same temperatures for alcohols with different ordinal numbers m’s in the methanol series. It is shown that the non-monotonic character of the temperature dependences of alcohol densities is associated with methanol rather than ethanol, as may seem at first glance. The critical temperature of methanol also deviates from the quasilinear dependence of the critical alcohol temperatures on m. With the growing m, the ratio between the critical and triple-point temperatures for alcohols is shown to tend to the corresponding value for water. Simple linear dependences of the electronic and effective static polarizabilities of alcohol molecules on m are established. The transverse and longitudinal components of the polarizability tensor for alcohol molecules are found. The dipole moments of the closest neighbor molecules in the alcohols are proved to anticorrelate, i.e. to orient in opposite directions.

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Section: Discussion Of the Resultsmentioning

confidence: 99%

Section: Discussion Of the Resultsmentioning

confidence: 99%

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Extraordinary Properties of Alcohols from the Homologous Series of Methanol

2020

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“…Therefore, in a vicinity of the methanol molecule, its electric field affects the ordering in the environment more strongly. This speculation is supported by the diameters of methanol and ethanol molecules (3.89 and 4.41Å, respectively [43,44]) and their dipole moments (1.706 and 1.68 D, respectively [45]).…”

Section: Discussion Of the Results Obtainedmentioning

confidence: 99%

Qualitative Analysis of Clustering in Aqueous Alcohol Solutions. II

Chechko¹,

Gotsulskiy

Diieva

2019

Ukr. J. Phys.

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Specific features of the clustering in aqueous solutions of monoatomic alcohols have been discussed. Main attention is focused on details of the clustering in water-ethanol solutions. The clustering degree is supposed to depend on the nteraction between ethanol and water molecules, as well as on the ordering degree of the H-bond network in water, which changes with the temperature and concentration of the alcohol. The elementary cluster volume is assumed to be smaller than the sum of the molecular volumes of components that form this cluster. The clustering degree in aqueous solutions of methanol and ethanol and its concentration and temperature dependences are determined.

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“…In accordance with said above they should describe by the equation: increases with approaching the water triple point. Only in the narrow vicinity of the critical point these our conclusions should be précised [20,27].…”

Section: D) Manifestation Of H-bonds In Water Eosmentioning

confidence: 79%