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.
Papers published on a yearly basis
Papers
More filters
TL;DR: The heat capacity of natural atacamite has been measured between T = 2 K and T = 305 K by cryogenic-adiabatic calorimetry as mentioned in this paper.
5 citations
TL;DR: In this paper, the surface pressure of mixed monolayers of octadecylurea and hexadecurea has been measured as a function of mean area per molecule at various temperatures and compositions.
Abstract: The surface pressure of mixed monolayers of octadecylurea and hexadecylurea has been measured as a function of mean area per molecule at various temperatures and compositions. The surface pressure of the phase transition obtained was observed to decrease both with an increase in temperature and with an addition of another component. With the aid of the thermodynamic method developed previously, the apparent molar entropy and energy changes associated with the phase transition were found to be positive. These positive values were explained by the rupture of the intermolecular hydrogen bonding. Furthermore, the activity coefficients of film-forming components with reference to their respective pure components were considered in connection with the mutual interaction between octadecylurea and hexadecylurea molecules. It was concluded that the system exhibits the negative azeotropy as a result of the difficulty in forming the hydrogen bonding in the mixed monolayer.
5 citations
TL;DR: In this article, a tubular cobaltite Bi 3.7 Sr 11.4 Co 8 O 29− δ ceramics was synthetized using X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS).
5 citations
TL;DR: In this article, the temperature dependence of the heat capacity of bis(η6-o-xylene)chromium(I) fulleride, over the temperature range 6-340 K was measured on an adiabatic vacuum calorimeter.
Abstract: The temperature dependence of the heat capacity of bis(η6-o-xylene)chromium(I) fulleride, [(η6-(o-xylene))2Cr]+•[C60]•−, over the temperature range 6–340 K was measured on an adiabatic vacuum calorimeter. The low-temperature (20 K ≤ T ≤ 50 K) heat capacity was subjected to multifractal processing; conclusions about the heterodynamic character of the structure were drawn. The experimental data were used to calculate the standard thermodynamic functions Cp∘(T), H∘(T)-H∘(0), S∘(T), and G∘(T)-H∘(0) over the temperature range from T → 0 to 340 K and estimate the standard entropy of fulleride formation from simple substances at 298.15 K. The standard thermodynamic characteristics of [(η6-(o-xylene))2Cr]+•[C60]•− were compared with those of the initial fullerene C60.
5 citations
TL;DR: In this article, a low-temperature precision adiabatic calorimeter for heat capacity measurements has been constructed and the heat capacities of a shape memory alloy (Ni 47 Ti 44 Nb 9 ) and a normal reference alloy (Nb 80 Ti 14 Ni 6 ) have been measured in the temperature range from 60 to 350 K with thiscalorimeter.
5 citations