Results 21 to 30 of about 11,102,711 (256)

A millifluidic calorimeter with InfraRed thermography for the measurement of chemical reaction enthalpy and kinetics [PDF]

open access: yes, 2008
The aim of this work is to present an infrared calorimeter for the measurement of the kinetics and the enthalpy of high exothermic chemical reactions. The main idea is to use a millifluidic chip where the channel acts as a chemical reactor.
PRADERE, Christophe   +3 more
core   +1 more source

Energetic Effects in Methyl- and Methoxy-Substituted Indanones: A Synergistic Experimental and Computational Study

open access: yesApplied Sciences, 2023
This experimental and computational study on the energetic properties of 2-methyl-, 3-methyl-, 4-methoxy- and 5-methoxy-indanones has been carried out using mostly calorimetric techniques and a suitable computational approach.
Ana L. R. Silva   +2 more
doaj   +1 more source

Sublimation/vaporization and solvation enthalpies of monosubstituted pyridine derivatives

open access: yesChemical Thermodynamics and Thermal Analysis, 2022
Different sectors, including medicine and display technology, utilize substituted pyridines. To establish the quality of products manufactured from pyridines, chemical thermodynamics of the solvation and evaporation enthalpies of the pyridines are ...
Rawand S. Abdullah, Boris N. Solomonov
doaj   +1 more source

A Departure Function-Based Method to Determine the Effect of the Oil Circulation Ratio on the Performance of Vapor Compression Refrigeration Systems [PDF]

open access: yes, 2012
A method to estimate the performance of single-stage vapor compression refrigeration systems as a function of the oil circulation ratio is presented. The model is based on the Peng-Robinson equation of state and on the theory of departure functions to ...
Barbosa Jr., Jader   +1 more
core   +1 more source

About the possibility of applying empirical methods of estimation of standard enthalpies of formation of organic compound for fullerenes

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
Due to the high practical significance and, as a consequence, active study of carbon nanomaterials, the question of methods for investigating their physicochemical, in particular, thermodynamic properties is relevant.
A.R. El Zanin   +5 more
doaj   +1 more source

Investigation into far-field drag calculation methods and pseudo total enthalpy generation for airplane CFD

open access: yesJournal of Fluid Science and Technology, 2019
In this study drag calculations were performed for an airplane cruising at transonic speed in a flow-field using two far-field methods. Subjected flow-fields in the calculations were computational fluid dynamics (CFD) results of Reynolds-averaged Navier ...
Kisa MATSUSHIMA   +2 more
doaj   +1 more source

The 2-D Cluster Variation Method: Topography Illustrations and Their Enthalpy Parameter Correlations

open access: yesEntropy, 2021
One of the biggest challenges in characterizing 2-D image topographies is finding a low-dimensional parameter set that can succinctly describe, not so much image patterns themselves, but the nature of these patterns. The 2-D cluster variation method (CVM)
Alianna J. Maren
doaj   +1 more source

Application of enthalpy method for moving boundary problem in laser surface melting

open access: yes, 1999
A numerical analysis was carried out to study the moving boundary problem in the physical process of pulsed Nd-YAG laser surface melting prior to vaporization.
王会才, 洪友士
core   +2 more sources

Estimation of Formation Enthalpy for Alkanes from 13C NMR Chemical Shifts

open access: yesChinese Journal of Magnetic Resonance, 2019
The quantitative relationship between the 13C NMR chemical shifts of alkanes and their formation enthalpy was studied. A new approach for calculating the formation enthalpy from the 13C NMR chemical shifts was proposed.
WU Ya-xin, CAO Chen-zhong, TENG Li-li
doaj   +1 more source

Platform Chemicals from Ethylene Glycol and Isobutene: Thermodynamics “Pays” for Biomass Valorisation and Acquires “Cashback”

open access: yesChemistry, 2023
Ethylene glycol (EG) produced from biomass is a promising candidate for several new applications. In this paper, EG derivatives such as mono- and di-tert-butyl ethers are considered.
Sergey P. Verevkin   +1 more
doaj   +1 more source

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