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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">phmath</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Государственного университета просвещения. Серия: Физика-Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Federal State University of Education. Series: Physics and Mathematics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-5083</issn><issn pub-type="epub">2949-5067</issn><publisher><publisher-name>Federal State University of Education</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">phmath-290</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>ИЗМЕНЕНИЕ ТЕРМОДИНАМИЧЕСКИХ СВОЙСТВ ГАЗОВ
ПРИ ОБРАЗОВАНИИ В НИХ ПРОСТЕЙШИХ КЛАСТЕРОВ</article-title><trans-title-group xml:lang="en"><trans-title>CHANGING OF GASES THERMODYNAMIC PROPERTIES PRODUCED
BY SIMPLEST CLUSTERS FORMATION</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гелиев</surname><given-names>А. В.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email></contrib></contrib-group><pub-date pub-type="collection"><year>2012</year></pub-date><pub-date pub-type="epub"><day>08</day><month>01</month><year>2023</year></pub-date><volume>0</volume><issue>2</issue><fpage>141</fpage><lpage>152</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гелиев А.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Гелиев А.В.</copyright-holder><copyright-holder xml:lang="en">Гелиев А.В.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.physmathmgou.ru/jour/article/view/290">https://www.physmathmgou.ru/jour/article/view/290</self-uri><abstract><p>Основываясь на ab-initio методах квантовой химии, изучаются физико-химические свойства простейших ван-дер-ваальсовых кластеров азота, метана и углекислого газа. Рассчитываются структуры и энергетические характеристики димеров (кластеров, содержащих две молекулы): энергии диссоциации, вращательные постоянные, частоты межмолекулярных колебаний. По данным расчётов определяются суммы по квантовым состояниям различных видов движений, константы равновесия реакций образования димеров. Используя константы равновесия реакций, на основе предложенной газокинетической кластерной модели определяются мольные доли димеров газов, показывается существенное влияние димеров на теплоёмкость газообразного азота, метана и углекислого газа.</p></abstract><trans-abstract xml:lang="en"><p>The physicochemical properties of the simplest nitrogen, methane and carbon
dioxide van der Waals clusters have been investigated on the basis of ab initio quantum
chemistry methods. Dimers (clusters including two molecules) structure and energy characteristics
such as the dissociation energy, rotational constants, intermolecular vibrational
frequencies have been calculated. Various kinds of motion partition functions, equilibrium
constants for the dimerization reactions have been determined with the use of the calculations
results. The mole fraction of gas dimers have been determined and significant
influence of the dimers on the thermal capacity of gaseous nitrogen, methane and carbon
dioxide have been shown on the basis of the introduced gas-kinetic cluster model with the
use of the reactions equilibrium constants.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кластер</kwd><kwd>димер</kwd><kwd>ассоциаты</kwd><kwd>константа равновесия</kwd><kwd>квазихимическая кластерная модель</kwd><kwd>молекулярная орбиталь</kwd><kwd>гамильтониан</kwd><kwd>уравнение Шрёдингера</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cluster</kwd><kwd>dimer</kwd><kwd>associates</kwd><kwd>equilibrium constant</kwd><kwd>quasi-chemical cluster model</kwd><kwd>molecular orbital</kwd><kwd>Hamiltonian</kwd><kwd>Schrödinger equation</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Хобза П., Заградник Р. Межмолекулярные комплексы: Роль ван-дер-ваальсовых систем в физической химии и биодисциплинах. М.: Мир, 1989.</mixed-citation><mixed-citation xml:lang="en">Хобза П., Заградник Р. 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