Partial molar volumes of some dipolar ions in water at 35 °C

1990 ◽  
Vol 68 (5) ◽  
pp. 725-727 ◽  
Author(s):  
M. Iqbal ◽  
M. Mateeullah
Keyword(s):  
Chain Length ◽  
Partial Molar Volumes ◽  
Density Data ◽  
Molar Volumes ◽  
Solvent Interactions ◽  
Solute Interactions ◽  
Partial Molar Expansibilities ◽  
Glycyl Glycine

This work reports partial molar volumes, V0, of eight peptides and three other dipolar ions (glycine, diglycine, triglycine, dl-alanyl-dl-valine, glycyl-dl-alanine, glycyl-dl-leucine, glycyl-tyrosine dihydrate, dl-alanyl-glycyl-glycine, l-valyl-glycyl-glycine, l-lysine-l-aspartate, l-lysine-l-glutamate) in water, calculated from density data obtained at 35 °C. V0 data are interpreted in terms of solute–solvent interactions. In some cases where V0 data at 25 °C were available from the literature, a comparison indicates that partial molar volumes of these solutes at 35 °C are higher than their respective volumes at 25 °C by about 2–3 cm3 mol−1. Partial molar expansibilities, E0, were also estimated in such cases. Expansibility data appear to show a trend indicating dependence of E0 values on the chain length of the solute molecules. Some plausible modes of solute–solute interactions are also discussed. Keywords: hydration of dipolar ions, partial molar volumes of peptides, solute–solvent interactions, electrostriction, solute–solute interactions.

On the calculation of partial molar volumes at infinite dilution from experimental density data

2020 ◽  
pp. 1-7
Author(s):  
Jorge Álvarez Juliá ◽  
María Del Carmen Grande ◽  
Carmen Raquel Barrero ◽  
Carlos Miguel Marschoff
Keyword(s):  
Infinite Dilution ◽  
Partial Molar Volumes ◽  
Density Data ◽  
Molar Volumes ◽  
Experimental Density

Volumetric Properties of Sodium Cyclamate Solutions in Presence of Glucose and Sucrose

2017 ◽  
Vol 75 ◽  
pp. 37-46
Author(s):  
Sanjeevan J. Kharat ◽  
Sachin M. Munde
Keyword(s):  
Partial Molar Volumes ◽  
Sweet Taste ◽  
Interaction Coefficients ◽  
Molar Volumes ◽  
Solvent Interactions ◽  
Hydrophilic Group ◽  
All Solutions ◽  
Density Values ◽  
Sodium Cyclamate ◽  
Specific Volumes

Densities of sodium cyclamate (Na-cycl) in water and (0.1, 0.3, and 0.5)m(glucose/sucrose) have been measured at (298.15, 303.15, 308.15, and 313.15) K. From density values, partial molar volumes (V0Φ), expansion coefficient (E∞), Hepler’s constant (δ2V0Φ/δT2)p, apparent specific volumes (ASV), partial molar volumes of transfer (∆trsV0Φ), doublet (VAB) and triplet (VABB) interaction coefficients have been calculated. An increase in the values ofV0Φand ∆trsV0Φwas observed with increase in the concentration of glucose/sucrose. The positive values ofE∞ andV0Φare due to the strong solute-solvent interactions. The positive values of (δ2V0Φ/δT2)psuggest structure making behaviour of sodium cyclamate in water and in presence of glucose and sucrose. The positive values of (∆trsV0Φ) andVABmay be due to the interactions between hydrophilic group (–OH, C=O, and –O–) of glucose/sucrose and sodium ion of sodium cyclamate. All solutions studied exhibit sweet taste because ASV of all solutions ranges from (0.569 × 10-6) m3×kg-1to (0.626 × 10-6) m3×kg-1.

scholarly journals Volumetric studies of alcohols in water and aqueous micelle solutions of cetyltrimethylammonium bromide

1970 ◽  
Vol 24 (2) ◽  
pp. 143-157 ◽  
Author(s):  
T Parvin ◽  
M Alauddin ◽  
M Rokonuzzaman
Keyword(s):  
Molar Volume ◽  
Apparent Molar Volume ◽  
Cetyltrimethylammonium Bromide ◽  
Surfactant Concentration ◽  
Partial Molar Volumes ◽  
Chemical Society ◽  
Volume Data ◽  
Palisade Layer ◽  
Molar Volumes ◽  
Partial Molar Expansibilities

The volumetric properties of 1-propanol, cyclohexanol and butoxyethanol in water and CTAB water mixtures have been studied. The apparent molar volumes of 1-propanol, cyclohexanol and butoxyethanol in water and in aqueous solutions of CTAB were determined from density data. The partial molar volumes of the alcohols in water and aqueous micelle solutions at infinite dilution, V20(mic) were obtained from apparent molar volume data and compared with the corresponding values. The standard partial molar expansibilities, E20(mic) of the solubilizates were evaluated from V20(mic) data at various temperatures. The volumetric studies of alcohols in CTAB micelles indicate that alcohols on the average are preferentially solubilized in the palisade layer of the micelle and increasing amount of each is transferred more deep into the palisade layer of the micelle with increasing surfactant concentration and temperature. The results of standard partial molar volume, V20 and standard partial molar expansibilities, E20 are reported and discussed. DOI: http://dx.doi.org/10.3329/jbcs.v24i2.9703 Journal of Bangladesh Chemical Society, Vol. 24(2), 143-157, 2011

scholarly journals Solution behavior of iron(III)-N,N'-ethylene-bis-(salicylideneiminato)-chloride in aqueous methanol at 298.15, 303.15 and 313.15K

2014 ◽  
Vol 79 (2) ◽  
pp. 225-239 ◽  
Author(s):  
Dhiraj Brahman ◽  
Biswajit Sinha
Keyword(s):  
Ambient Pressure ◽  
Activation Parameters ◽  
Partial Molar Volumes ◽  
State Theory ◽  
Aqueous Methanol ◽  
Molar Volumes ◽  
Ternary Solutions ◽  
Partial Molar Expansibilities ◽  
Solvent Molecules ◽  
B Coefficients

In this study partial molar volumes (?V0) and viscosity B-coefficients of iron(III)-N, N'-ethylene-bis(salicylideneiminato)-chloride, abbreviated as FeIII(salen)Cl, in different aqueous methanol solutions were determined from solution density and viscosity measurements at temperatures 298.15, 303.15, and 313.15 K under ambient pressure. Apparent molar volumes (?V) and densities (?) were used to calculate the apparent molar expansibilities (?E), the partial molar expansibilities (?E0) and the temperature dependence of the partial molar expansibilities (?E0) at constant pressure, (??E0/?T)P of FeIII(salen)Cl solutions to reveal the nature of different interactions in the ternary solutions. The transition state theory was applied to analyze the viscosity B-coefficients on the basis of the activation parameters of viscous flow. The overall results indicated strong solute-solvent interactions between FeIII(salen)Cl and the solvent molecules, preferentially with water molecules and that FeIII(salen)Cl acts as a net structure promoter in the ternary solutions. UV-VIS absorption spectra of the ternary solutions also stand in support of the results obtained.

scholarly journals Solution thermodynamics of aqueous nicotinic acid solutions in presence of tetrabutylammonium hydrogen sulphate

2013 ◽  
Vol 78 (8) ◽  
pp. 1225-1240 ◽  
Author(s):  
Abhijit Sarkar ◽  
Biswajit Sinha
Keyword(s):  
Aqueous Solutions ◽  
Nicotinic Acid ◽  
Ambient Pressure ◽  
Activation Parameters ◽  
Partial Molar Volumes ◽  
State Theory ◽  
Group Interactions ◽  
Molar Volumes ◽  
Solvent Interactions ◽  
Hydrogen Sulphate

In this study we investigated the effects of tetrabutylammonium hydrogen sulphate (Bu4NHSO4) on the solute-solute and solute-solvent interactions in the aqueous solutions of nicotinic acid in terms of apparent molar volumes (?V), standard partial molar volumes (?V0) and viscosity B-coefficients at 298.15, 308.15, and 318.15 K under ambient pressure. These interactions are further discussed in terms of ion-dipolar, hydrophobic- hydrophobic, hydrophilic-hydrophobic group interactions. The activation parameters of viscous flow for Bu4NHSO4 in the aqueous solutions of nicotinic acid were discussed in terms of transition state theory. The overall results indicated that ion-hydrophilic and hydrophilic-hydrophilic group interactions are predominant in the aqueous solutions of nicotinic acid and Bu4NHSO4 has a dehydration effect on the hydrated nicotinic acid.

scholarly journals Solution thermodynamics of sodium pyruvate in aqueous glycine solutions at T 298.15-313.15 K

2016 ◽  
Vol 81 (11) ◽  
pp. 1283-1294 ◽  
Author(s):  
Bijan Pandit ◽  
Abhijit Sarkar ◽  
Biswajit Sinha
Keyword(s):  
Ambient Pressure ◽  
Activation Parameters ◽  
Partial Molar Volumes ◽  
State Theory ◽  
Solution Thermodynamics ◽  
Sodium Pyruvate ◽  
Group Interactions ◽  
Molar Volumes ◽  
Solvent Interactions ◽  
B Coefficients

In this study we investigated the effects of sodium pyruvate on the solution thermodynamics of glycine in terms of the solute-solute and solute-solvent interactions in aqueous solutions. Measured density and viscosity were used to derive apparent molar volumes (?V), standard partial molar volumes (?V0) and viscosity B-coefficients at 298.15, 303.15 K, 308.15, and 318.15 K under ambient pressure. The interactions are further discussed in terms of ion-dipolar, hydrophobic- hydrophobic, hydrophilic-hydrophobic group interactions. The activation parameters of viscous flow were also discussed in terms of transition state theory. The overall results indicated that ion-hydrophilic and hydrophilic-hydrophilic group interactions are predominant in the ternary solutions.

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