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Standard molar entropy

About: Standard molar entropy is a research topic. Over the lifetime, 1586 publications have been published within this topic receiving 29886 citations.


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Journal ArticleDOI
TL;DR: In this article, the activity coefficients of isomeric monosaccharides, D-glucose, Dmannose, and D-galactose were determined by isopiestic comparison method at 25 °C.
Abstract: Activity coefficients of isomeric monosaccharides, D-glucose, D-mannose, and D-galactose were determined by isopiestic comparison method at 25 °C Excess partial molar entropy of water (\barSwex) of each monosaccharide solution was negative and the absolute value increased with concentration of solute From the magnitudes of negative \barSwex, it was concluded that the structure making ability among three isomers lies in the order D-glucose>D-mannose>D-galactose

70 citations

Journal ArticleDOI
TL;DR: The thermodynamic parameters of the solution of hydrogen in binary vanadium-chromium alloys (to 20 at.96 at. % Cr) have been determined in this article.

70 citations

Journal ArticleDOI
TL;DR: In this article, the removal and recovery of thorium(IV) [Th(IV)] ions from aqueous solutions were investigated using poly(methacrylic acid)-grafted-cellulose/bentonite (PMAA-g-Cell/Bent) composite through batch adsorption experiments.
Abstract: The removal and recovery of thorium(IV) [Th(IV)] ions from aqueous solutions were investigated using poly(methacrylic acid)-grafted-cellulose/bentonite (PMAA-g-Cell/Bent) superabsorbent composite through batch adsorption experiments. Surface characterizations of the adsorbent were investigated. The adsorbent showed significant Th(IV) removal (>99.7%) at pH 5.0. The influence of coexisting ions on the adsorption of Th(IV) was studied. Mass transfer aspects of Th(IV) adsorption onto PMAA-g-Cell/Bent were evaluated. The Sips adsorption isotherm described the adsorption data very well, with a maximum adsorption capacity of 188.1 mg/g. Thermodynamic parameters such as standard enthalpy (ΔH°), standard entropy (ΔS°), standard free energy (ΔG°), activation energy (Ea), isosteric enthalpy (ΔHx), and entropy (ΔSx) were calculated. Tests with a seawater sample revealed the effectiveness of PMAA-g-Cell/Bent for adsorptive removal of Th(IV) from aqueous solutions. Desorption experiments showed that 0.1 M HNO3 can eff...

68 citations

Journal ArticleDOI
TL;DR: In this article, the authors provided a critical study on the adsorption of boron by electrochemically generated zinc hydroxide, and the results showed that the optimum removal efficiency of 93.2% was achieved at a current density of 0.2

68 citations

Journal ArticleDOI
TL;DR: In this article, a new adsorbent for the removal of zinc(II) from aqueous environment was proposed, which was fitted well with Langmuir isotherm model and pseudo-second-order kinetic model.
Abstract: Cashew nut shell (CNS) is an agricultural waste was investigated as a new adsorbent for the removal of zinc(II) from aqueous environment. Effects of solution pH, CNS dose, contact time, initial zinc(II) concentration and temperature on removal efficiency were tested and optimum conditions were evaluated. The equilibrium data were fitted well with Langmuir isotherm model and pseudo-second-order kinetic model. Langmuir monolayer adsorption capacity of CNS was examined as 24.98 mg/g. Changes in standard Gibbs free energy (▵G°), standard enthalpy (▵H°) and standard entropy (▵S°) showed that the sorption of zinc(II) ions onto CNS are spontaneous and exothermic at 303–333 K. Sorption process was found to be controlled by both surface and pore diffusion. A batch adsorber was designed for different CNS dose to effluent volume ratios using Langmuir equation. Effective diffusivity values were found to be 1.927 × 10−11 (10 mg/L), 2.135 × 10−11 (20 mg/L), 2.267 × 10−11 (30 mg/L), 2.305 × 10−11 (40 mg/L) and 2.362 × 10−11 (50 mg/L) m2/s. © 2011 Canadian Society for Chemical Engineering

68 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202316
202229
202141
202055
201949
201857