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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: Koga et al. as discussed by the authors measured the speeds of sound, u, and the densities, d, and, hence, determined the adiabatic compressibilities, κS, of aqueous tert-butanol (TBA) at small increments in mole fraction of TBA, xTBA.
Abstract: We measured the speeds of sound, u, and the densities, d, and, hence, determined the adiabatic compressibilities, κS, of aqueous tert-butanol (TBA) at small increments in mole fraction of TBA, xTBA. Existing data for heat capacity, Cp, and thermal expansivity, αp, were used to convert κS to the isothermal compressibilities, κT. Using these κT data, the normalized volume fluctuations, VΔ, and their composition derivative, the partial molar volume fluctuations of TBA, VΔTBA, (Y. Koga and P. Westh, Bull. Chem. Soc. Jpn., 1996, 69, 1505) were calculated. By using Cp data available in the literature we also calculated the normalized entropy fluctuations, SΔ, and the partial molar entropy fluctuations of TBA, SΔTBA. Furthermore, the density data at 15, 25 and 35°C in the literature were used to evaluate the thermal expansivities, αp, from which the normalized cross (entropy–volume) fluctuations, SVΔ, and the partial molar cross-fluctuations of TBA, SVΔTBA, were calculated. The composition dependence of these fluctuation functions were interpreted in the light of the mixing schemes in aqueous solutions of TBA and other non-electrolytes and the transition between them (Y. Koga, J. Phys. Chem., 1996, 100, 5172).
34 citations
TL;DR: The total vapour pressure of aqueous tetrt-butanol (TBA) was measured in small increments in the range xTBA < 0.2 at 25.15 and 30.00 ° C as mentioned in this paper.
34 citations
TL;DR: In this article, the effects of various parameters such as adsorbent dosage, pH, contact time, and temperature on the equilibrium constant were studied and the thermodynamic parameters like standard Gibb's free energy, standard enthalpy, and standard entropy were also investigated.
34 citations
TL;DR: In this paper, the results predict an endothermic nature of adsorption and a spontaneous process, and a pseudo-second order model could best describe the adorption kinetics.
34 citations
TL;DR: In this paper, the heat capacity of the chlorite CCa-2 from Flagstaff Hill, California, was measured by low temperature adiabatic calorimetry and differential scanning caloreimetry, from 5 to 520 K (at 1 bar).
34 citations