Topic
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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TL;DR: In this paper, the long term stability of lutetium rhodite (LuRhO3) as an electrode for photoelectrochemical decomposition of water is investigated.
3 citations
TL;DR: In this article, the heat capacities of 1-butyl-3-methylimidazolium lactate ionic liquids ([C4mim][Lact]) were measured with a highly accurate automatic adiabatic calorimeter over the temperature range from 79 to 406 K. And the experimental values of molar heat capacities were fitted to a polynomial equation using least square method in appropriate temperature ranges.
Abstract: The heat capacities of 1-butyl-3-methylimidazolium lactate ionic liquids ([C4mim][Lact]) were measured with a highly accurate automatic adiabatic calorimeter over the temperature range from 79 to 406 K. And the experimental values of molar heat capacities were fitted to a polynomial equation using least square method in the appropriate temperature ranges. The standard molar heat capacity was determined to be 1734.46 ± 5.12 J K−1 mol−1 at 298.15 K. The molar enthalpy and molar entropy of the transition were determined to be 15.575 ± 0.045 and 64.44 ± 0.14 J K−1 mol−1. Other thermodynamic properties, such as (HT − H298.15) and (ST − S298.15), were also calculated. Furthermore, when the temperature reaches 241.87 K, the strongest peaks appeared by analysis of the heat capacity curve. This phenomenon could be explained from the interionic interaction, which is the hydrogen bond between the anions and cations.
3 citations
TL;DR: The heat capacity of benzil was measured by adiabatic calorimetry between 15 and 300 K as discussed by the authors, and the third-law entropy of the gas under standard conditions lies between 480.2 and 428 J·K −1 ·mol −1 depending on the value used for the sublimation entropy.
3 citations
TL;DR: In this article, the authors reported the clouding in anionic surfactant (SDBS) and tetrabutylammonium bromide system in the presence of additives, such as ureas, amino acids and sugars.
Abstract: The energetics of clouding in anionic surfactant (SDBS) and tetrabutylammonium bromide system in the presence of additives, such as ureas, amino acids and sugars is reported. The change of standard Gibbs energy of solubilization (ΔG
o
) for all of the additives was found to be negative. The values of change of standard enthalpy (ΔH
o
) and that of standard entropy (TΔS
o
) values were found to depend on the type and chemistry of the additive. The results were explained on the basis including chemistry of additives, their effect on water structure, and solubilization of additives either in the micellar or in aqueous phases.
3 citations
Journal Article•
TL;DR: In this paper, a phosphate glass melt with the basic composition of NaPO 3.2Sr(PO 3 ) 2 doped with various oxides of polyvalent elements was studied with the aid of square-wave voltammetry.
Abstract: A phosphate glass melt with the basic composition of NaPO 3 .2Sr(PO 3 ) 2 doped with various oxides of polyvalent elements (Fe 2 O 3 , As 2 O 3 , Sb 2 O 3 , CuO and SO 4 2- ) was studied with the aid of square-wave voltammetry. The standard potentials depended linearly on temperature. The standard enthalpy ΔH° and the standard entropy ΔS° of the attributed redox reactions were calculated from the standard potentials measured. The diffusion coefficients were determined from current densities obtained and fulfilled the Arrhenius' law. Both thermodynamics of the redox equilibria and diffusion coefficients are compared with those measured in soda-lime-silica glasses.
3 citations