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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 lattice entropy of isostructural iso-anionic rare-earth compounds is estimated by taking into account the effects of cation mass and molar volume.
Abstract: Resolution of excess entropy of many types of transitions and estimation of standard entropy at 298.15K of compounds, for which experimental entropies have not yet been measured, depend on a reliable estimation of the lattice entropy. By taking into account the effects of cation mass and molar volume of the rare-earth compounds, the following formula is proposed for the estimation of the lattice entropy of isostructural iso-anionic rare-earth compounds. We have investigated 32 compounds, and found good agreements between estimated and experimental entropies.
Journal ArticleDOI
TL;DR: In this paper, the dissolution enthalpies of KZnPO 4 were calculated using a solution-reaction isoperibol solution calorimeter at 298.15 K.
Journal ArticleDOI
TL;DR: In this paper, the standard thermodynamic functions of the reactions of synthesis and thermal decomposition of copper uranogermanate were calculated and discussed, as well as the standard entropy and Gibbs energy of its formation at 298.15 K and the standard enthalpy of dehydration of its crystal hydrates were determined by reaction calorimetry.
Abstract: The standard enthalpy of formation of crystalline copper uranogermanate at 298.15 K and the standard enthalpies of dehydration of its crystal hydrates were determined by reaction calorimetry. The heat capacity of Cu(HGeUO6)2·6H2O was measured by adiabatic vacuum calorimetry in the range 80-300 K, and the thermodynamic functions of this compound, as well as the standard entropy and Gibbs energy of its formation at 298.15 K, were calculated. The standard thermodynamic functions of the reactions of synthesis and thermal decomposition of copper uranogermanate were calculated and discussed.
Journal ArticleDOI
TL;DR: The heat capacity of potassium hexafluoroferrate(III) has been measured between 12 and 320 K as mentioned in this paper, and the standard molar entropy of K 3 FeF 6 (cr) at 298.15 K has been estimated to be (321 ± 5) J·K −1 ·mol −1.
Proceedings ArticleDOI
03 Nov 2017
TL;DR: In this article, a new sorbent based on Silochrom C-120 modified with nickel acetylacetonate was studied using a complex of physico-chemical methods.
Abstract: One of the areas of development of gas chromatography is the creation of new chromatographic materials that have improved sorption and analytical characteristics. In this work, for the first time, a new sorbent based on Silochrom C-120 modified with nickel acetylacetonate was studied using a complex of physico-chemical methods. It has been established that due to chemical modification of silica gel surface with nickel acetylacetonate the surface area of the specific surface decreases from 112 to 98 m2/g and surface acidity diminishes by 1.2 pH units. Using the thermogravimetric analysis it has been revealed that the obtained sorbent can be used in gas chromatography up to 290°C. Gas chromatography method was used to investigate the adsorption properties of the modified materials. According to the retention data of adsorbates: n-alkanes (C6-C9), benzene, ethanol, nitropropane and butanone-2 the differential molar adsorption energy qdif, 1, Henry adsorption constants К1,С, the differential molar entropy ΔS...

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