Вісники НТУ "ХПІ"
Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/2494
З 1961 р. у ХПІ видається збірник наукових праць "Вісник Харківського політехнічного інституту".
Згідно до наказу ректора № 158-1 від 07.05.2001 року "Про упорядкування видання вісника НТУ "ХПІ", збірник був перейменований у Вісник Національного Технічного Університету "ХПІ".
Вісник Національного технічного університету "Харківський політехнічний інститут" включено до переліку спеціалізованих видань ВАК України і виходить по серіях, що відображають наукові напрямки діяльності вчених університету та потенційних здобувачів вчених ступенів та звань.
Зараз налічується 30 діючих тематичних редколегій. Вісник друкує статті як співробітників НТУ "ХПІ", так і статті авторів інших наукових закладів України та зарубіжжя, які представлені у даному розділі.
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Документ Ion-pair conversion thermodynamics in alcohol solutions of hydrogen halides(Національний технічний університет "Харківський політехнічний інститут", 2023) Bulavin, V. I.; Vyunnik, I. N.; Kramarenko, A. V.; Rusinov, A. I.The calculation of thermodynamic characteristics of dissociation of contact and solvent-separated ion pairs into ions, conversion of contact ion pairs into solvent-separated ion pairs of ionogens HCl, HBr and HI in n-alcohols from methyl alcohol to n-octyl alcohol by the method described earlier for the systems HCl – n-alcohol in the same solvents at the same temperatures was carried out. The following regularities were established in this work: a) positive values of the change in the Gibbs energy of dissociation (ΔdisG°) of contact and solvent-separated ion pairs increase in the case of increasing temperature and the number of carbon atoms in the n-alcohol molecule and decreasing radius of the halide ion, and their sign and magnitude are determined by the entropic component (–TΔdisS°). In this case, the values of ΔdisG° of contact ion pairs exceed the same values for ion pairs separated by solvent; b) the values of the Gibbs energy change (ΔconvG°) for the studied ionogens HCl, HBr, and HI are also positive, except for the values of ΔconvG° of ionogens in methanol and HBr solutions in ethanol. In these cases, the ΔdisG° values for solvent-separated ion pairs exceed the same values for contact ion pairs, and the ΔconvG° values are negative. With increasing temperature and radius of the halide ion, ΔconvG° become more negative, and vice versa with increasing hydrocarbon radical; c) the concentration of contact ion pairs increases in the methanol – n-octanol series for all ionogens, decreases slightly with increasing temperature and radius of the anion, and varies from ~30% (methanol) to ~95% (n-octanol). In methanol, solvent-separated ion pairs predominate; in alcohols from n-propyl to n-octyl, contact ion pairs predominate, i.e., deconversion of ion pairs occurs.Документ Ion pair conversion thermodynamics in hydrogen bromide alcohol solutions(Національний технічний університет "Харківський політехнічний інститут", 2023) Bulavin, Viktor Ivanovich; Vyunnik, Ivan Nikolaevich; Kramarenko, Andrii Viktorovich; Rusinov, Alexander IvanovichThe thermodynamic quantities of dissociation of contact and solvent-separated ion pairs into ions, conversion of contact ion pairs into solventseparated ion pairs of HBr ionogen in n-alcohols from methyl to n-octyl have been calculated by the procedure we set forth earlier for the HCl – nalcohol systems in the same solvents at 278.15–328.15 K. The following regularities were established in this work: a) positive values of ΔdisGº of contact and solvent-separated ion pairs increase with increasing temperature, the number of carbon atoms in the n-alcohol molecule, and decreasing radius of halide ion, and their sign and magnitude are determined by the entropic component (–TΔdis Sº). In this case, the values of ΔdisGº of contact ion pairs exceed the same values for solvent-separated ion pairs; b) ΔconvGº values for HCl and HBr are also positive, except for ΔconvGº values in methanol at 278.15–328.15 K and HBr solutions at the same temperatures in ethanol. For these cases, by contrast, ΔdisGº(RIP) > ΔdisGº(CIP) and ΔconvGº are negative. As the temperature and radius of the halide ion increase, ΔconvGº become more negative, and vice versa as the hydrocarbon radical increases; c) the concentration of contact ion pairs increases in the methanol-n-octanol series, decreases slightly with increasing temperature and anion radius, and changes within ~30 % (methanol) to 95 % (n-octanol) at 278.15 K. In methanol, solvent-separated ion pairs predominate; in ethanol, the concentration of both types of ion pairs is approximately the same; in other n-octanols, contact ion pairs predominate.Документ Thermodynamics of ion pair conversion in alcohol solutions of hydrogen chloride(Національний технічний університет "Харківський політехнічний інститут", 2022) Bulavin, Viktor Ivanovych; V'unik, Ivan Nikolajevych; Kramarenko, Andrii Viktorovych; Rusinov, Alexandr IvanovychThe thermodynamic quantities of the dissociation stages of contact ion pairs (CIP) and solvent-separated ion pairs (SSIP) into ions, conversion of CIP into SSIP of the ionization process of HCl in n-alcohols from methyl to n-octyl at 278.15 – 328.15 K, i.e. in non-aqueous solvents that are most frequently used in chemical research and in chemical technology have been calculated. The proton and chloride ion forming HCl are modeled in a comparative study of the solvation process and the molecular mechanism of acid ionization in various solvents, which emphasizes the relevance of this study, in which the influence of the nature of the solvent, hydrogen chloride ions and temperature on the above thermodynamic quantities are considered. The calculation of the dissociation constants of CIP was carried out according to Ebeling’s equation, which takes into account the short range repulsive forces between the ions in the ion pair and the dispersion interactions between the solvent molecules. The dissociation constants and thermodynamic quantities of SSIPs have been calculated by the Schwartz method, which evaluates the physical and chemical parameters of the solvent (besides the dielectric permittivity also the free volume of the solvent molecules, isothermal compressibility, etc.) that significantly affect the properties of ion pairs. The main conclusions drawn from our analysis of the array of thermodynamic data on the ionization stages of HCl in n alcohols from methyl to n-octyl: (a) in methanol the predominant among the ion pairs are SSIPs, in ethanol the concentration of CIPs and SSIPs is approximately the same, and in other alcohols, the CIPs predominate; b) the concentration of CIPs increases with increasing alkyl radical of the alcohol when passing from methanol to n-octanol respectively from 30% to 95%; c) ratio of enthalpic (ΔconvH°) and entropic (–TΔconvS°) factors in methanol and ethanol ensures spontaneous conversion of CIP to SSIP; d) in alcohols from n-propyl to n-octyl values and sign ΔG° for the stages of dissociation of CIP and SSIP into ions and conversion of CIP to SSIP are determined by the entropic term (–ТΔS°), which leads to deconversion of ion pairs, i.e., the conversion of SSIPs into CIPs