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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 properties of e-Zn(OH) 2, the stable crystalline form of zinc hydroxide, were determined from measurements of the e.m.f. of the cell.
7 citations
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TL;DR: In this paper, an ionic liquid (IL), [C4Py][Al2Cl7] (n-butylpyridinium heptachlorodialuminate), was prepared, and its density and surface tension were measured under dry argon in the temperature range from (298.15 to 333.15) K. The experimental data showed that the Eotvos equation was applicable to the IL and the experimental parachor value was larger than that calculated from neutral parachor contribution which did not consider the Coulomb interaction in IL.
Abstract: An ionic liquid (IL), [C4Py][Al2Cl7] (n-butylpyridinium heptachlorodialuminate), was prepared, and its density and surface tension were measured under dry argon in the temperature range from (298.15 to 333.15) K. The experimental data showed that the Eotvos equation was applicable to the IL and the experimental parachor value was larger than that calculated from neutral parachor contribution which did not consider the Coulomb interaction in IL. In terms of Glasser's theory, the molar entropy, S0, and the lattice energy, UPOT, were estimated. Using Kabo's method the molar enthalpy of vaporization ΔlgHm0 (298 K) and using the interstice model the thermal expansion coefficient, α, for [C4Py][Al2Cl7] were predicted, respectively.
7 citations
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TL;DR: In this article, the standard enthalpies of 3-acetyl-2,5-dimethylfuran and 4-dimethyl-2-furaldehyde were derived from the measurements of the standard massic energies of combustion obtained by static bomb combustion calorimetry.
7 citations
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TL;DR: The entropy of C60 has been determined from its heat capacity data as mentioned in this paper, which is 4.7±0.5 J/K/mole at 0 °K and it is shown that C60 loses a considerable enthalpy when isothermally kept below 90 K.
Abstract: The entropy of C60 has been determined from its heat capacity data. It is 4.7±0.5 J/K/mole at 0 °K. The configurational thermodynamics analysis shows that C60 loses a considerable enthalpy when isothermally kept below 90 K.
7 citations
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TL;DR: The standard entropy of liquid CoI2 is found to be S°(CoI2,l, 298) = 44.5 ± 2 e.g. per mole.
Abstract: Aus Messungen des Gesamtdruckes uber flussigem Kobalt(II)-jodid und im ungesattigten Dampf wird der Zersetzungsdruck (J2 + J), der Sattigungsdruck an CoJ2 und Co2J4 sowie die Lage des Gleichgewichtes
ermittelt. Man erhalt daraus die Standardbildungsenthalpien ΔH°B(CoJ2,fl, 298) = −12,5 ± 3 kcal/mol, ΔH°B(CoJ2,g, 298) = 28,3 ± 3kcal/mol und ΔH°B(Co2J4,g, 298) = 15,6 ± 3 kcal/mol. Als Standardentropie fur flussiges CoJ2 wird S°(CoJ2,fl,298) = 44,5 ± 2 cl gefunden.
Investigations of the Equilibria in the Cobalt(II) Iodide Vapour
Total pressure measurements over cobalt(II) iodide and in the unsaturated vapour lead to equations for the decomposition pressure (I + I2) and for the saturation pressure of CoI2 and Co2I4, respectively, as well as for the constant of the equilibrium
Standard enthalpies of formation are obtained: ΔH°f(CoI2,l, 298) = −12.5 ± 3 kcal/mole, ΔH°f(CoI2,g,298) = 28.3 ± 3 kcal/mole, and ΔH°f(Co2I4,g,298) = 15.6 ± 3 kcal/mole. The standard entropy of liquid CoI2 is found to be S°(CoI2,l,298) = 44.5 ± 2 e. u. per mole.
7 citations