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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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TL;DR: In this paper, the standard molar enthalpies of 3, 4, and 4-methoxyacetophenone were derived from the Calvet high temperature vacuum sublimation technique, measured by static bomb combustion calorimetry.
10 citations
TL;DR: In this paper, the interaction between polyvinylpyrrolidone (PVP) and gemini surfactant (16- 5 -16) in aqueous solution has been analyzed using conductometry.
10 citations
TL;DR: In this article, the authors used the best fit equation for the temperature-dependent emf data to evaluate the partial thermodynamic functions of the SnTe and SnTe in the alloys.
Abstract: The SnTe–Sb2Te3–Te system has been studied in the temperature range 300–430 K using emf measurements on reversible concentration cells of the type (–)SnTe(s) | liquid electrolyte, Sn2+ |(Sn–Sb–Te)(s)(+). The system has been shown to consist of two three-phase regions, separated by the SnSb2Te4–Te tie line. The best fit equation for the temperature-dependent emf data has been used to evaluate the partial thermodynamic functions of the SnTe and Sn in the alloys. Using these data, subsolidus phase diagram data for the SnTe–Sb2Te3–Te system, and relevant thermodynamic functions for SnTe and Sb2Te3, we calculated the standard Gibbs energy of formation, standard enthalpy of formation, and standard entropy of the SnSb2Te4 compound.
10 citations
TL;DR: In this article, the standard molar enthalpies of combustion, Δ cr g H m ∘, for crystalline 2-, 4-, 6-chloroquinoline and 4,7-dichloroquine, were determined at the temperature 298.15 K using a rotating-bomb combustion calorimeter.
10 citations
01 Feb 1985
TL;DR: The thermodynamic properties of the hydrogen solution in amorphous Fe-Ti films (Ti: 43-60%) have been studied in the pressure range from 1 to 104 Pa and at temperatures from 293 to 623 K.
Abstract: The thermodynamic properties of the hydrogen solution in amorphous Fe - Ti films (Ti: 43–60%) have been studied in the pressure range from 1 to 104 Pa and at temperatures from 293 to 623 K. It is shown that the observed pressure-composition (PC) isotherms deviate positively from the Sievert's law, which is contrary to the negative deviation commonly observed in the hydrogen solution in crystalline compounds. In accordance with the positive deviation the relative partial molar enthalpies, - Δ H, derived from the isotherms decrease with increasing the hydrogen concentration, and at very dilute concentration the value is about three times larger than that for the formation of monohydride of crystalline FeTi. These anomalously large - Δ H values for hydrogen dissolution in amorphous Fe-Ti suggest that the local environment around the hydrogen atoms are quite different from that in crystalline FeTi. The relative partial molar entropy data are analyzed taking into account of the contribution from the vibrational and fromielectronic heat capacity and volume expansion terms. The results show that the number of interstitial sites available for hydrogen occupation at very dilute concentration is about five times smaller than the values observed in the V-, Nb-, Ta-H systems.
10 citations