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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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01 Jan 1988-International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes
TL;DR: In this paper, the solubilities, solubility products and thermodynamic functions for the dissolution of SmF30.5H2O(s) in water at 25°C have been measured using radiometric, conductometric and potentiometric methods.
5 citations
TL;DR: In this paper, the structural, electrical and thermodynamic properties of a La-Ni-Si [La = 28.9%, Ni = 67.5%, Si = 3.6%] alloy have been investigated.
Abstract: The structural, electrical and thermodynamic properties of a La-Ni-Si [La = 28.9%, Ni = 67.5%, Si = 3.6%] alloy have been investigated. Powder XRD results show that the lattice constants and unit cell volume of the alloy increase after hydrogen storage. It was also found that the resistance of the alloy increased with dissolved hydrogen concentration. Hydrogen absorption pressure composition isotherms have also been investigated which show the presence of two single a and β regions and one mixed (α + β) phase. The thermo-dynamic parameters viz. the relative partial molar enthalpy (ΔH) and relative partial molar entropy (ΔS) of dissolved hydrogen, are found to be in the range 8–18 kJ (mol H)-1 and 25–63 JK-1 (mol H)-1. From the dependence of ΔH on the hydrogen concentration,X, the different phases [α, α + β, β] and phase boundaries of the alloy-H system are identified. Thermal conductivity and diffusivity of La-Ni-Si and its hydride have been measured at room temperature by using TPS technique. Thermal conductivity was found to decrease due to absorbed hydrogen in the alloy.
5 citations
TL;DR: In this paper, a simple reverse-microemulsion method was used to harvest three different sizes of CaMoO4 micro/nano structures with three different size at room temperature.
Abstract: Peanut-like CaMoO4 micro/nano structures with three different sizes were harvested by a simple reverse-microemulsion method at room temperature. Employing synthesized micro/nano CaMoO4 and HCl as reaction systems, thermodynamic parameters such as standard molar enthalpy of reaction Δr
H
m
θ
, standard molar Gibbs free energy of activation Δ
r
≠
G
m
θ
, standard molar enthalpy of activation Δ
r
≠
H
m
θ
, and standard molar entropy of activation Δ
r
≠
S
m
θ
were successfully acquired for the first time by in situ microcalorimetry. Furthermore, change regularities of the thermodynamic parameters for the micro/nano reaction systems were obtained and discussed. It demonstrated that size effect has significant influence on thermodynamic parameters of micro/nano material reaction systems.
5 citations
TL;DR: In this article, the standard enthalpy of formation, ΔH f 0 (CsNO 3, c, 298.15 K) was calculated to be −(120.88 ± 0.12) kcal th mol −1.
5 citations
TL;DR: In this paper, a pure hydrated double strontium borates, K2Sr[B4O5(OH)4]2·10H2O, has been synthesized and characterized by XRD, FT-IR, DTA-TG and chemical analysis.
5 citations