{"title":"Heat Capacity Characteristics of the Solvation of Ammonium Ions in Mixed Solvent N-Methylpyrrolidone–Water at 298.15 K","authors":"A. N. Novikov, E. I. Kostyleva, S. N. Solovyov","doi":"10.1134/S0036024424702480","DOIUrl":null,"url":null,"abstract":"<p>Values of standard partial molar heat capacity <span>\\({{\\overline {C_{p}^{0}} }_{i}}\\)</span> are determined along with changes <span>\\(\\Delta \\mathop {\\text{.}}\\nolimits_{{\\text{solv}}} C_{{p{\\text{,}}i}}^{0}\\)</span> in heat capacity during the solvation of ammonium ions in a mixed MP–water solvent at 298.15 K. The value of <span>\\(\\Delta \\mathop {\\text{.}}\\nolimits_{{\\text{solv}}} C_{{p{\\text{,}}i}}^{0}\\)</span> of ammonium ions is presented as the sum of four contributions: electrostatic, cavity formation, structural changes in the solvent, and specific ion-solvent interactions. Values of the contributions are calculated on the basis of experimental data and model representations. The dependences of the obtained values on the composition of the mixture are discussed in connection with the structure of the mixed solvent.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 1","pages":"24 - 28"},"PeriodicalIF":0.7000,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry A","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036024424702480","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Values of standard partial molar heat capacity \({{\overline {C_{p}^{0}} }_{i}}\) are determined along with changes \(\Delta \mathop {\text{.}}\nolimits_{{\text{solv}}} C_{{p{\text{,}}i}}^{0}\) in heat capacity during the solvation of ammonium ions in a mixed MP–water solvent at 298.15 K. The value of \(\Delta \mathop {\text{.}}\nolimits_{{\text{solv}}} C_{{p{\text{,}}i}}^{0}\) of ammonium ions is presented as the sum of four contributions: electrostatic, cavity formation, structural changes in the solvent, and specific ion-solvent interactions. Values of the contributions are calculated on the basis of experimental data and model representations. The dependences of the obtained values on the composition of the mixture are discussed in connection with the structure of the mixed solvent.
期刊介绍:
Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world.
Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.