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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 article, the Clausius-Clapeyron equation was used to derive the standard enthalpies of formation of 9-methylanthracene, 2-ethylnithracene and 9,10-dimethylanthracene.
35 citations
TL;DR: In this paper, the authors measured the heat capacity of synthetic hedenbergite, ferrobustamite, and CaFeSi2O6 glass by low-temperature adiabatic and differential scanning calorimetry.
34 citations
TL;DR: In this article, the Clausius-Clapeyron equation was used to derive the standard molar enthalpies of formation and sublimation of the terphenyls.
34 citations
TL;DR: In this paper, the standard entropy of formation at 298 K, Δ f S o 2 9 8, was determined from measuring the heat capacity, C p, from near-absolute zero (2 K) to 300 K by the relaxation method.
Abstract: The thermodynamic properties of Mg 2 Zn 3 were investigated by calorimetry. The standard entropy of formation at 298 K, Δ f S o 2 9 8 , was determined from measuring the heat capacity, C p , from near-absolute zero (2 K) to 300 K by the relaxation method. The standard enthalpy of formation at 298 K, Δ f H o 2 9 8 , was determined by solution calorimetry in hydrochloric acid solution. The standard Gibbs energy of formation at 298 K, Δ f G o 2 9 8 , was determined from these data. The results obtained were as follows: Δ f H o 2 9 8 (Mg 2 Zn 3 ) = -69.80 ′ 20 kJ . mol - 1 ; Δ f S o 2 9 8 (Mg 2 Zn 3 ) = -10.95 ′ 1.80 J . K - 1 . mol - 1 ; Δ f G o 2 9 8 (Mg 2 Zn 3 ) = -66.55 ′ 20 kJ mol - 1 . The electronic contribution to the heat capacity of Mg 2 Zn 3 was found to be similar to pure magnesium, indicating that the density of states in the vicinity of the Fermi level follows the free-electron parabolic law.
34 citations
TL;DR: In this article, high-temperature drop-calorimetric measurements have been performed on a pure synthetic specimen of tungsten disulfide, WS2, and the following molar thermodynamic quantities are reported at To = 298.15 K: the standard enthalpy of formation, ΔfHmo(To), −(240.8±3.1) kJ·mol−1; the heat capacity, Cp,mo(to), (63.82±0.32) J·K−1·mol −1; and
34 citations