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 article, the rate of change of the standard chemical potential with solvent composition was calculated from precise vapor-pressure measurements for urea at three temperatures and for thiourea at 298.15°K in water-tetrahydrofuran (THF) mixtures.
Abstract: The rate of change of the standard chemical potential with solvent composition,
$$\partial \bar G_0 /\partial Z$$
, has been calculated from precise vapor-pressure measurements for urea at three temperatures and for thiourea at 298.15°K in water-tetrahydrofuran (THF) mixtures. From these results the standard free energy of transfer ΔG
t
o
of the solutes from water to various water-THF mixtures has been obtained together with the standard molar entropy ΔS
t
o
and the standard molar enthalpy ΔH
t
o
of transfer at 298.15°K in the case of urea. The quantity ΔG
t
o
for urea is negative in the water-rich region and positive for mole fractions THF>0.2. There is a nearly complete compensation between ΔH
t
o
andTΔS
t
o
at 298.15°K up to mole fraction THF=0.5. These phenomena can be partly related to the structure in H2O-THF mixtures.
11 citations
TL;DR: In this paper, the Soret effect of mixing and transport in the mixed conductor α-Ag2Se has been investigated using the following solid state thermogalvanic cell: Measurements of the emf E21 between the Pt-leads Pt2 and Pt1 and of E34 between Pt3 and Pt4 between Pt4.
11 citations
11 citations
TL;DR: In this article, single crystals of ZnBi2B2O7 (ZBBO) have been successfully grown by the top-seeded growth method from a high-temperature melt.
11 citations
TL;DR: In this paper, water vapor adsorption isotherms at five temperatures between 0 and 40°C were obtained on Li and Na kaolinite and the data were used to calculate the integral and differential entropy of the adsorbed water phase.
Abstract: Water vapor adsorption isotherms at five temperatures between 0 and 40°C were obtained on Li and Na kaolinite. By a careful experimental technique, the error in the determination of weight of water adsorbed was reduced to + 0.01 mg/g and that of equilibrium vapor pressure was reduced to ± 0.0002 mm Hg. The data were used to calculate the integral and differential entropy of the adsorbed water phase.
11 citations