Download or read book ETUDE STRUCTURALE ET THERMODYNAMIQUE DU SYSTEME N TETRACOSANE written by ZEINEB.. ACHOUR and published by . This book was released on 1994 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: DES DEPOTS DE CRISTAUX D'HYDROCARBURES, SE FORMENT DANS LES GAZOLES A BASSE TEMPERATURE. CEUX-CI SONT PRINCIPALEMENT CONSTITUES DE N-ALCANES QUI FORMENT ENTRE EUX DES SOLUTIONS SOLIDES. POUR PREVOIR CETTE CRISTALLISATION, IL EST NECESSAIRE DE CONNAITRE LES PROPRIETES THERMODYNAMIQUES DES MELANGES SOLIDES. LE BUT DE CE TRAVAIL EST L'ETUDE DU SYSTEME BINAIRE DE N-ALCANES PAIRS N-TETRACOSANE (N-C#2#4H#5#0): N-HEXACOSANE (N-C#2#6H#5#4), DONT LE DIAGRAMME EST INCOMPLET. APRES UNE DESCRIPTION DES METHODES EXPERIMENTALES UTILISEES, ET UNE REVUE BIBLIOGRAPHIQUE SUR LES N-ALCANES PURS ET EN MELANGES BINAIRES, LE DIAGRAMME DE PHASES N-TETRACOSANE: N-HEXACOSANE EST ETABLI EXPERIMENTALEMENT PAR ANALYSE THERMIQUE DIFFERENTIELLE, ENTHALPIMETRIQUE DIFFERENTIELLE ET RADIOCRISTALLOGRAPHIE. IL EST MIS EN EVIDENCE A 293 K ET EN FONCTION DE LA CONCENTRATION MOLAIRE EN N-HEXACOSANE, LA PRESENCE DE DEUX SOLUTIONS PRIMAIRES DE STRUCTURE TRICLINIQUE ET DE TROIS SOLUTIONS SOLIDES INTERMEDIAIRES DE STRUCTURE ORTHORHOMBIQUE. LE COMPORTEMENT DES MELANGES EN FONCTION DE LA TEMPERATURE FAIT APPARAITRE QUATRE OU CINQ SEQUENCES DE PHASES SELON LA SOLUTION SOLIDE CONSIDEREE. UNE SYSTEMATIQUE DE DIAGRAMMES BINAIRES DE N-ALCANES PAIRS DIFFERENTS DE DEUX CARBONES EST ETABLIE PAR ANALOGIE AVEC LE SYSTEME N-DOCOSANE (N-C#2#2H#4#6): N-TETRACOSANE (N-C#2#4H#5#0) ET LE SYSTEME N-EICOSANE (N-C#2#0H#4#2): N-DOCOSANE (N-C#2#2H#4#6). LE TRAITEMENT DES MESURES ENTHALPIMETRIQUES EST ENSUITE EFFECTUE. LES VARIATIONS D'ENTHALPIE EN FONCTION DE LA TEMPERATURE DES SOLUTIONS SOLIDES QUI APPARAISSENT A TEMPERATURE AMBIANTE SONT TRAITEES PAR UNE EXPRESSION DERIVEE DU SOLIDE D'EINSTEIN. LES ENTHALPIES ET LES ENTROPIES D'EXCES, DES DIFFERENTES PHASES SONT REPRESENTEES PAR UN MODELE DE MARGULES A DEUX TERMES. CELLES-CI JOINTES AUX TEMPERATURES ET AUX ENTHALPIES DE TRANSITION DES CORPS PURS PERMETTENT DE CALCULER LES COURBES LIMITES DE PHASES DES DIFFERENTS EQUILIBRES. LE DIAGRAMME AINSI CALCULE COINCIDE AVEC CELUI ETABLI EXPERIMENTALEMENT

Download or read book Etude cristallographique et thermodynamique des n paraffines pures octad cane t tracosane et du m lange binaire docosane t tracosane written by Nasr-Eddine Hasnaoui and published by . This book was released on 1987 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude cristallographique sur les corps purs (docosane, tricosane, tétracosane) amène d'une part, à confirmer les différentes transformations allotropiques et d'autre part, à observer la transition delta du n-tricosane et sur le mélange binaire (docosane-tétracosane), elle a conduit à la mise en évidence de nouvelles phases intermédiaires de structures orthorhombiques. Par ailleurs, l'étude calorimétrique sur les corps purs a permis de compléter les données thermodynamiques dans ce domaine, et de les étendre jusqu'au tetracosane ; sur les mélanges elle a conduit à la détermination des enthalpies de formation du solide et du liquide. Enfin, les deux études ont conduit à l'établissement du diagramme binaire docosane-tétracosane

Download or read book Heat Capacities and Entropies of Organic Compounds in the Condensed Phase written by E. S. Domalski and published by American Institute of Physics. This book was released on 1984 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energetics of Stable Molecules and Reactive Intermediates written by M.E. Minas da Piedade and published by Springer. This book was released on 1999-05-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the major experimental and theoretical methods currently used to study the energetics of stable molecules and reactive intermediates. Reviews the ate of the art and shows the interplay of experimental and theoretical methods used to probe bonding energetics and reactivity and a wide range of chemical species. A modern and invaluable introduction to the study of molecular energetics. A reference for workers currently involved in the field.

Download or read book Glassy Amorphous and Nano Crystalline Materials written by Jaroslav Šesták and published by Springer Science & Business Media. This book was released on 2010-10-26 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a summary of non-equilibrium glassy and amorphous structures and their macro- and microscopic thermal properties. The book contains a carefully selected works of fourteen internationally recognized scientists involving the advances of the physics and chemistry of the glassy and amorphous states.

Download or read book Encyclopedia of Surface and Colloid Science written by P. Somasundaran and published by CRC Press. This book was released on 2006 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photoacoustic and Photothermal Phenomena written by Peter Hess and published by Springer. This book was released on 2014-03-12 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: photoacoustic and Photothermal Phenomena contains reviews and a large numberof selected contributed papers reporting progress in the application of new photoacoustic and photo- thermal techniques in physics, chemistry, biology, medicine and materials science. Theoretical and experimental work is presented on spectroscopy, kinetics and relaxation, trace analysis, mass and heat transport, surfaces and thin films, nondestructive evaluation,ultrasonics and semiconductors.

Download or read book Physical Supramolecular Chemistry written by L. Echegoyen and published by Springer. This book was released on 2011-09-20 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of Supramolecular chemistry has reached a high level of sophistication and maturity, especially in the last 5-10 years. The sophistication is primarily evident in the highly complex chemical architectures that have been synthesized to accomplish specific functions such as selective binding and transport of substrates, in catalysis, and for the formation of assemblies, to name just a few of the applications. Many other molecular structures have been synthesized to form unusual materials with interesting and/or useful properties. From this point of view, the field is mature, as would have been anticipated from its historical development, starting in 1967 with Pedersen and the crown ethers. Since that time, the field has evolved mainly from a synthetic organic perspective. There are notable exceptions to this statement, but in general it holds true that the major advances were made in the laboratories of organic chemists with considerable topological insight. by The design and synthesis of the molecules was also partly guided physical insight provided by measurements and calculations done by physical chemists. As a consequence, many chemical systems were synthesized in relatively small amounts to afford their full characterization but not in large enough quantities to fully explore their intended properties or structures. Thus in the decades of the 70's and 80's physical chemists played an important role in guiding the future directions in the field, providing needed structural and energetic information and providing improved experimental designs.

Download or read book Particulate Systems in Nano and Biotechnologies written by Wolfgang Sigmund and published by CRC Press. This book was released on 2008-12-22 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the widespread growth and acceptance of particulate technology, challenges in the design, operation, and manufacturing of these systems still exists. These critical issues must be resolved so that particle technology may continue to serve as a foundation for new nano and biotechnologies. Particulate Systems in Nano- and Biotechnologies pres

Download or read book Advanced Chemistry of Monolayers at Interfaces written by Toyoko Imae and published by Elsevier. This book was released on 2007-04-20 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Chemistry of Monolayers at Interfaces describes the advanced chemistry of monolayers at interfaces. Focusing on the recent trends of methodology and technology, which are indispensable in monolayer science. They are applied to monolayers of surfactants, amphiphiles, polymers, dendrimers, enzymes, and proteins, which serve many uses. Introduces the methodologies of scanning probe microscopy, surface force instrumentation, surface spectroscopy, surface plasmon optics, reflectometry, and near-field scanning optical microscopy. Modern interface reaction method, lithographic technology and different types of monolayers like adsorption, Langmuir and Langmuir-Blodgett monolayers at air/liquid, liquid/liquid, liquid/solid and air/solid interfaces, are all covered. Introducing novel methodologies and technologies Covering the different types of monolayers Discusses all currently available instrumental techniques for studying all types of monolayer

Download or read book The Characterization of High temperature Vapors written by John L. Margrave and published by . This book was released on 1967 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Films the Cyclotron and the New Biology written by and published by . This book was released on 1942 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Energetics written by José A. Martinho Simões and published by Oxford University Press. This book was released on 2008-07-14 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a broad discussion of the concepts required to understand the thermodynamic stability of molecules and bonds and a description of the most important condensed-phase techniques that have been used to obtain that information. Above all, this book attempts to provide useful guidelines on how to choose the "best" data and how to use it to understand chemistry. Although the book assumes some basic knowledge on physical-chemistry, it has been written in a "textbook" style and most topics are addressed in a way that is accessible to advanced undergraduate students. Many examples are given throughout the text, involving a variety of molecules. This text will provide a good starting point for those who wish to initiate in the field or simply to understand how to assess, to estimate, and to use thermochemical data. It will therefore appeal to a broad range of practicing chemists and particularly to those interested in energetics-structure-reactivity relationships.

Download or read book Combustion Calorimetry written by Stig Sunner and published by Elsevier. This book was released on 2016-06-03 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental Chemical Thermodynamics, Volume 1: Combustion Calorimetry covers the advances in calorimetric study of combustion, with particular emphasis on the accuracy of the method. This book is composed of 18 chapters, and begins with a presentation of the units and physical constants with the basic units of measurements. The succeeding chapters deal with basic principles of combustion calorimetry, emphasizing the underlying basic principles of measurement. These topics are followed by discussions on calibration of combustion calorimeters, test and auxiliary substances in combustion calorimetry, strategies in the calculation of standard-state energies of combustion from the experimentally determined quantities, and assignment of uncertainties. The final chapter considers the history of combustion calorimetry. This book will prove useful to combustion chemists and engineers, as well as researchers in the allied fields.

Download or read book Energetics of Organometallic Species written by José A. Martinho Simões and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of modern organometallic thermochemistry, made by some of the most active scientists in the area, is offered in this book. The contents correspond to the seventeen lectures delivered at the NATO ASI Energetics of Organometallic Species (Curia, Portugal, September 1991), plus three other invited contributions from participants of that summer school. These papers reflect a variety of research interests, and discuss results obtained with several techniques. It is therefore considered appropriate to add a few preliminary words, attempting to bring some unity out of that diversity. In the first three chapters, results obtained by classical calorimetric methods are described. Modern organometallic thermochemistry started in Manchester, with Henry Skinner, and his pioneering work is briefly surveyed in the first chapter. The historical perspective is followed by a discussion of a very actual issue: the trends of stepwise bond dissociation enthalpies. Geoff Pilcher, another Manchester thermochemist, makes, in chapter 2, a comprehensive and authoritative survey of problems found in the most classical of thermochemical techniques - combustion calorimetr- applied to organometallic compounds. Finally, results from another classical technique, reaction-solution calorimetry, are reviewed in the third chapter, by Tobin Marks and coworkers. More than anybody else, Tobin Marks has used thermochemical values to define synthetic strategies for organometallic compounds, thus indicating an application of thermochemical data of which too little use has been made so far.

Download or read book Surface and Colloid Science written by Fernando Galembeck and published by Springer Science & Business Media. This book was released on 2004-12-08 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes 58 contributions to the 11th International Conference on Surface and Colloid Science, a highly successful conference sponsored by the International Association of Colloid and Interface Scientists and held in Iguassu Falls, Brazil, in September 2003. Topics covered are the following: Biocolloids and Biological Applications, Charged Particles and Interfaces, Colloid Stability, Colloidal Dispersions, Environmental Colloidal Science, Interfaces and Adsorption, Nanostructures and Nanotechnology, Self-Assembly and Structured Fluids, Surfactants and Polymers, Technology and Applications, Colloids and Surfaces in Oil Production. Surface and colloid science has acquired great momentum during the past twenty years and this volume is a good display of new results and new directions in this important area.

Download or read book Experimental Thermodynamics written by B. Le Neindre and published by Elsevier. This book was released on 2013-10-22 with total page 1345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental Thermodynamics, Volume II: Experimental Thermodynamics of Non-reacting Fluids focuses on experimental methods and procedures in the study of thermophysical properties of fluids. The selection first offers information on methods used in measuring thermodynamic properties and tests, including physical quantities and symbols for physical quantities, thermodynamic definitions, and definition of activities and related quantities. The text also describes reference materials for thermometric fixed points, temperature measurement under pressures, and pressure measurements. The publication takes a look at absolute measurement of volume and equation of state of gases at high temperatures and low or moderate temperatures. Discussions focus on volumes of cubes of fused silica, density of water, and methods of measuring pressure. The text also examines the compression of liquids and thermodynamic properties and velocity of sound, including thermodynamics of volume changes, weight methods, and adiabatic compression. The selection is a dependable reference for readers interested in the thermophysical properties of fluids.