The Influence of Sulfoxides and Sulfones on the Temperature of Maximum Density of Water

Macdonald, Digby D.; Smith, M. D.; Hyne, J. B.

doi:10.1139/v71-469

Cited by 39 publications

(21 citation statements)

References 8 publications

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“…For the three amino acids there is a linear dependence of Dh with molality in accordance with the behaviour predicted by Despretz equation. The behaviour exhibited by the amino acids is similar to that observed for electrolytes and some non-ionic solutes that disrupt water structure [2,3,5,8,9,11,30]. The slope of the plots of Dh vs. molality, corresponds to the Despretz constants.…”

Section: Resultssupporting

confidence: 59%

“…To determine the temperature of maximum density for each amino acid solution, the experimental densities were plotted as a function of temperature. The curves obtained were fitted using the least-squares method to a parabolic equation [30], to determine the maximum of the curve which represents the temperature of maximum density for the aqueous solutions as can be observed in figure 4. Table 5 summarises the results for the temperature of maximum density obtained in this work.…”

Section: Resultsmentioning

confidence: 99%

“…The simpler approaches assume that each methylene group interacts independently with water and its contribution is independent of the polar groups in the solute molecule. This approach was used in this work and Dh was plotted as a function of the number of carbon atoms assuming that is approximately equivalent to the number of methylene groups [30,31]:…”

Section: Resultsmentioning

confidence: 99%

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Effect of glycine, dl-alanine and dl-2-aminobutyric acid on the temperature of maximum density of water

Romero

Torres

2015

The Journal of Chemical Thermodynamics

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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effect of glycine, dl-alanine and dl-2-aminobutyric acid on the temperature of maximum density of water

Romero

Torres

2015

The Journal of Chemical Thermodynamics

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“…It is worthwhile to note here that while excess heats and volumes of mixing data confined to 26.5"C, whereas the present studies are confined to high temperature range (36-77°C). Therefore it may be concluded that the structural propensity of a solute as revealed by physical property is dependent on temperature and literature survey ( 1 2 , 1 3 ) indicates that structural interactions are sensitive to temperature and structure promoting interactions decrease with rise in temperature (14). The results of present study on water + cyclohexanone indicate that cyclohexanone loses its structure stabilizing character as temperature is increased and behaves as a structure breaker at higher temperature.…”

Section: Discussionmentioning

confidence: 52%

Temperature dependance of adiabatic compressibility, sound velocity, and specific acoustic impedance of water–cyclohexanone mixture

Ramanjappa¹,

Rajagopal²

1988

Can. J. Chem.

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T. RAMANJAPPA and E. RAJAGOPAL. Can. J. Chem. 66. 371 (1988). The temperature dependance of adiabatic compressibility minimum (TACM), sound velocity maximum (TSVM), and specific acoustic impedance (TSAIM) of water-cyclohexanone mixture has been studied by experimentally determining the sound velocity in and density of aqueous solution at different concentrations over a temperature range 36-77°C. The structural contribution to the shift in TACM, TSVM, and TSAIM has been evaluated. The shifts are negative and increase with concentration. The results indicate that cyclohexanone behaves as a structure breaker at higher temperature.T. RAMANJAPPA et E. RAJAGOPAL. Can. J. Chem. 66, 371 (1988).OpCrant h des tempkratures allant de 36 a 77"C, on a mesurk les densitCs et les vitesses du son dans des solutions aqueuses, h diverses concentrations de cyclohexanone; on en a dCduit la relation qui existe entre la tempirature et la compressibilitk adiabatique minimale (TCAM), la vClocitt maximale du son (TCMS) et 1'impCdance acoustique specifique (TIMAS). On a CvaluC le contribution de la structure au diplacement dans la TCAM, la TCMS et la TIMAS. Les dkplacements sont nCgatifs et ils augmentent avec la concentration. Les rksultats indiquent que, a des tempkratures Clevees, la cyclohexanone se comporte comme une substance qui brise les structures.[Traduit par la revue]Literature survey indicates that the thermodynamic behaviour of the system water-cyclohexanone has not been extensively studied but for a few measurements on excess heats of mixing and excess volumes of mixing (1, 2). Both the excess heats of mixing and excess volumes of mixing for this system have been found to be negative (AH = -5365 cal mol-' and AV = -4.5 mL mol-I). The magnitude and sign of AH and AV for this system fall in line with alcohols and amines (2). In general the contraction has been explained by the strong cohesive nature of water molecules. The behaviour of excess heats of mixing of this solute with water may be attributed to the formation of icebergs like alcohols and amines. However, no authentic evidence exists regarding the structural interaction of this solute with water. Since the studies on the effect of different solutes on temperature corresponding to velocity maximum (TSVM) and temperature corresponding to adiabatic compressibility minimum (TACM) of water have been found to characterize the structural propensity of any solute (3-7), the authors made an attempt to see how this solute modifies the hydrogen bonded structure of water by determining the structural contributions to the shift in TSVM and TACM. In addition to these studies. temperature corresponding to specific acoustic impedance maximum (TSAIM) studies of water have been also carried out and the results are reported in this paper. ExperimentalTriple distilled water was used to prepare stock solutions of aqueous cyclohexanone. Cyclohexanone was purified using standard procedures (8). The density of the purified liquid, determined using a bicapillaq type pycnometer with an accurac...

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“…The shift in the temperature of maximum density (TMD) of water that occurs on dissolution of a solute is now recognized as a useful tool for the investigation of solute induced changes in the structure of liquid water (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). However, a number of recent papers (6,(10)(11)(12) suggest that some confusion exists as to the appropriate interpretation of the data.…”

Section: Introductionmentioning

confidence: 99%

The interrelationship between partial molal expansibility and the solute induced shift in the temperature of maximum density of water

Macdonald¹,

Hyne²

1976

Can. J. Chem.

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. Can. J. Chem. 54, 3073 (1976).The effect of solutes on the temperature of maximum density (TMD) of water is analysed with emphasis upon the applicability of thermodynamic dissection of the observed change in the TMD (ABobs) into ideal (&Bid) and structural (AO,,) components. The use of TMD as a probe for examining the effect of dissolved solutes on the structural properties of water is critically compared with methods based upon apparent and partial molal expansibilities.

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The Influence of Sulfoxides and Sulfones on the Temperature of Maximum Density of Water

Cited by 39 publications

References 8 publications

Effect of glycine, dl-alanine and dl-2-aminobutyric acid on the temperature of maximum density of water

Effect of glycine, dl-alanine and dl-2-aminobutyric acid on the temperature of maximum density of water

Temperature dependance of adiabatic compressibility, sound velocity, and specific acoustic impedance of water–cyclohexanone mixture

The interrelationship between partial molal expansibility and the solute induced shift in the temperature of maximum density of water

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