Using several reaction examples with experimentally determined rate equations, traditional mass-action rate equations are
shown to be simplified forms of polynomial approximation to a general rate function derived by non-equilibrium thermodynamics
for a mixture of fluids with linear transport properties. The mass-action kinetic law is thus proved also on the macroscopic
level and limited to this type of fluids.
Authors:Dmitry Yu. Murzin, Olga A. Simakova, Irina L. Simakova, and Valentin N. Parmon
different pH (data taken from [ 4 ])
Even if the model is able to explain experimental observations, it should be explicitly pointed out here that the real thermodynamics could be more complicated than the one considered
From nanotechnology-based thermal insulation materials nano-ceramic thermal insulation coatings are generally considered to be the most critical because of contradictory technical data that could be founded in special literature. Complete agreement had not been already found about the mechanism how does their insulating effect take. In the Laboratory of Building Materials and Building Physics at Széchenyi István University (Győr, Hungary) several thermodynamic tests were made in order to find out thermodynamic process inside this material. Several building structures with different order of layers were tested with heat flow meter. Results showed that convective heat transfer coefficient cannot be taken account in usual way using this material as thermal insulation.
Among nanotechnology-based thermal insulation materials thermodynamic performance of nano-ceramic coatings generates intensive discussions. Complete agreement has not been found yet about the mechanism of their insulating effect. In the Laboratory of Building Materials and Building Physics at Széchenyi István University (Győr, Hungary) heat transfer resistance experiments have been performed in order to describe thermodynamic processes inside nano-ceramic coatings. Previous studies finding after new measurements conducted in 2016-2017 also supported the former assumption that in case of nano-ceramic coatings convective heat transfer coefficient might be taken into account in a different way. Results also showed that thermal insulating effect of nano-ceramic coatings could be caused by a relatively high surface heat transfer resistance.
Authors:Roberto Dante, Czesław Kajdas, and Andrzej Kulczycki
The new approach to the kinetics of triboreactions, based on a mathematical model denoted as αi model implies energy emitted by the surface as impulses in the range of 1–5 eV. This communication looks for a better understanding
of the mechanism of triboreactions by explaining the αi model, proposed previously in terms of the thermodynamics of irreversible processes. The reaction rate Jc found by non-equilibrium thermodynamics is also consistent with two superimposed pathways for tribochemical reactions. In
the former, the reaction follows the thermal mechanism typical of no friction conditions, in the latter, direct transfer of
energy from triboelectrons to molecules generate special excited or activated molecules A*, such as radicals or ions which
react rapidly to form the products, enhancing the global reaction rate.
Authors:Evgeniy V. Kulish, Marat M. Abashev, Anna Ivannikova, and Alexey Schenyatsky
Numerical-analytical methods based on variation approach to the tasks of mechanics of deformable solid, liquid, gas, hydro- and thermodynamics, multilinked contact and on analytical decisions of loosely-coupled tasks are presented in this paper. The suggested numerical-analytical method allows investigating on high technological level the high-strength joints with guaranteed interference (pressed, hydropressed, thermal, multilayered, autofrettaged, multi-contact (polyjoints)) at various stages of life cycle, except for recycling. Method allow: to determine mode of deformation, joint loading capacity in view of technology factor influence; to calculate parameters of technological processes with the diverse contact effects proceeding in joints, assembled by various methods.
Authors:E. Csányi, K. Bélafi-Bakó, N. Nemestóthy, and L. Gubicza
or 2-methylpropyl ethanolate or methyl benzoate or 2-ethylhexan-l-ol) at 293 K. J. Chem. Thermodynamics , 23 , 859-865.
(Liquid+liquid) equilibria of (furfural+water+ethyl ethanoate or 2-methylpropyl ethanolate or methyl