- Table View
- List View
Thermoacoustic Instability: A Complex Systems Perspective (Springer Series in Synergetics)
by R. I. Sujith Samadhan A. PawarThis book systematically presents the consolidated findings of the phenomenon of self-organization observed during the onset of thermoacoustic instability using approaches from dynamical systems and complex systems theory. Over the last decade, several complex dynamical states beyond limit cycle oscillations such as quasiperiodicity, frequency-locking, period-n, chaos, strange non-chaos, and intermittency have been discovered in thermoacoustic systems operated in laminar and turbulent flow regimes. During the onset of thermoacoustic instability in turbulent systems, an ordered acoustic field and large coherent vortices emerge from the background of turbulent combustion. This emergence of order from disorder in both temporal and spatiotemporal dynamics is explored in the contexts of synchronization, pattern formation, collective interaction, multifractality, and complex networks. For the past six decades, the spontaneous emergence of large amplitude, self-sustained, tonal oscillations in confined combustion systems, characterized as thermoacoustic instability, has remained one of the most challenging areas of research. The presence of such instabilities continues to hinder the development and deployment of high-performance combustion systems used in power generation and propulsion applications. Even with the advent of sophisticated measurement techniques to aid experimental investigations and vast improvements in computational power necessary to capture flow physics in high fidelity simulations, conventional reductionist approaches have not succeeded in explaining the plethora of dynamical behaviors and the associated complexities that arise in practical combustion systems. As a result, models and theories based on such approaches are limited in their application to mitigate or evade thermoacoustic instabilities, which continue to be among the biggest concerns for engine manufacturers today. This book helps to overcome these limitations by providing appropriate methodologies to deal with nonlinear thermoacoustic oscillations, and by developing control strategies that can mitigate and forewarn thermoacoustic instabilities. The book is also beneficial to scientists and engineers studying the occurrence of several other instabilities, such as flow-induced vibrations, compressor surge, aeroacoustics and aeroelastic instabilities in diverse fluid-mechanical environments, to graduate students who intend to apply dynamical systems and complex systems approach to their areas of research, and to physicists who look for experimental applications of their theoretical findings on nonlinear and complex systems.
Thermoacoustics: A Unifying Perspective for Some Engines and Refrigerators
by Gregory W. SwiftThis updated new edition provides an introduction to the field of thermoacoustics. All of the key aspects of the topic are introduced, with the goal of helping the reader to acquire both an intuitive understanding and the ability to design hardware, build it, and assess its performance. Weaving together intuition, mathematics, and experimental results, this text equips readers with the tools to bridge the fields of thermodynamics and acoustics. At the same time, it remains firmly grounded in experimental results, basing its discussions on the distillation of a body of experiments spanning several decades and countries. The book begins with detailed treatment of the fundamental physical laws that underlie thermoacoustics. It then goes on to discuss key concepts, including simple oscillations, waves, power, and efficiency. The remaining portions of the book delve into more advanced topics and address practical concerns in applications chapters on hardware and measurements. With its careful progression and end-of-chapter exercises, this book will appeal to graduate students in physics and engineering as well as researchers and practitioners in either acoustics or thermodynamics looking to explore the possibilities of thermoacoustics. This revised and expanded second edition has been updated with an eye to modern technology, including computer animations and DeltaEC examples.
Thermochemical Conversion of Biomass for the Production of Energy and Chemicals
by Anthony DufourThis book highlights the processes of biomass thermochemical conversion, covering topics from combustion and gasification, to pyrolysis and liquefaction. Heat, power, biofuels and green chemicals can all be produced by these thermochemical processes. The different scales of investigation are presented: from the bioenergy chains, to the reactors and molecular mechanisms. The author uses current research and data to present bioenergy chains from forest to final use, including the biomass supply chains, as well as the life cycle assessment of different process chains. Biomass conversion reactors are also presented, detailing their technologies for combustion, gasification and syngas up-grading systems, pyrolysis and bio-oil upgrading. The physical-chemical mechanisms occurring in all these reactors are presented highlighting the main pathways for gas, char and bio-oil formation from biomass. This book offers an overview of biomass valorization for students, engineers or developers in chemistry, chemical, environmental or mechanical engineering.
Thermochemical Processing of Biomass: Conversion into Fuels, Chemicals and Power (Wiley Series in Renewable Resource #13)
by Robert C. BrownA comprehensive examination of the large number of possible pathways for converting biomass into fuels and power through thermochemical processes Bringing together a widely scattered body of information into a single volume, this book provides complete coverage of the many ways that thermochemical processes are used to transform biomass into fuels, chemicals and power. Fully revised and updated, this new edition highlights the substantial progress and recent developments that have been made in this rapidly growing field since publication of the first edition and incorporates up-to-date information in each chapter. Thermochemical Processing of Biomass: Conversion into Fuels, Chemicals and Power, 2nd Edition incorporates two new chapters covering: condensed phased reactions of thermal deconstruction of biomass and life cycle analysis of thermochemical processing systems. It offers a new introductory chapter that provides a more comprehensive overview of thermochemical technologies. The book also features fresh perspectives from new authors covering such evolving areas as solvent liquefaction and hybrid processing. Other chapters cover combustion, gasification, fast pyrolysis, upgrading of syngas and bio-oil to liquid transportation fuels, and the economics of thermochemically producing fuels and power, and more. Features contributions by a distinguished group of European and American researchers offering a broad and unified description of thermochemical processing options for biomass Combines an overview of the current status of thermochemical biomass conversion as well as engineering aspects to appeal to the broadest audience Edited by one of Biofuels Digest’s "Top 100 People" in bioenergy for six consecutive years Thermochemical Processing of Biomass: Conversion into Fuels, Chemicals and Power, 2nd Edition will appeal to all academic researchers, process chemists, and engineers working in the field of biomass conversion to fuels and chemicals. It is also an excellent book for graduate and advanced undergraduate students studying biomass, biofuels, renewable resources, and energy and power generation.
Thermochemical Processing of Biomass
by Robert C. Brown Christian StevensThermochemical pathways for biomass conversion offer opportunities for rapid and efficient processing of diverse feedstocks into fuels, chemicals and power. Thermochemical processing has several advantages relative to biochemical processing, including greater feedstock flexibility, conversion of both carbohydrate and lignin into products, faster reaction rates, and the ability to produce a diverse selection of fuels.Thermochemical Processing of Biomass examines the large number of possible pathways for converting biomass into fuels, chemicals and power through the use of heat and catalysts. The book presents a practical overview of the latest research in this rapidly developing field, highlighting the fundamental chemistry, technical applications and operating costs associated with thermochemical conversion strategies.Bridging the gap between research and practical application, this book is written for engineering professionals in the biofuels industry, as well as academic researchers working in bioenergy, bioprocessing technology and chemical engineering.Topics covered include:CombustionGasificationFast PyrolysisHydrothermal ProcessingUpgrading Syngas and Bio-oilCatalytic Conversion of Sugars to FuelsHybrid Thermochemical/Biochemical ProcessingEconomics of Thermochemical ConversionFor more information on the Wiley Series in Renewable Resources, visit www.wiley.com/go/rrs
Thermodiffusion in Multicomponent Mixtures
by M. Ziad Saghir Seshasai SrinivasanThermodiffusion in Multicomponent Mixtures presents the computational approaches that are employed in the study of thermodiffusion in various types of mixtures, namely, hydrocarbons, polymers, water-alcohol, molten metals, and so forth. We present a detailed formalism of these methods that are based on non-equilibrium thermodynamics or algebraic correlations or principles of the artificial neural network. The book will serve as single complete reference to understand the theoretical derivations of thermodiffusion models and its application to different types of multi-component mixtures. An exhaustive discussion of these is used to give a complete perspective of the principles and the key factors that govern the thermodiffusion process.
Thermodynamic and Kinetic Aspects of the Vitreous State (Laser And Optical Science And Technology Ser.)
by S.V. NemilovThis is the first book to logically present the major problems of the vitreous state within the framework of irreversible thermodynamics. Filled with elementary explanations for difficult problems, this easily understood text/reference treats in detail the criteria of glass transition, the peculiarities of relaxing structural parameters, and the Prigogine-Defay ratio. Based on the author's rigorous generalization of the Second Law for non-equilibrium, the book systematizes all known thermodynamic data for glasses and melts. The thermodynamic essence of structural relaxation and memory effects are considered. The viscous flow theories are treated as a constituent of the kinetic description. All theoretical questions are illustrated by comparison of calculations with the experiments for glasses of inorganic and organic nature, with special attention to structural classification. An informative review of modern structural investigations is included. The bibliography follows the history of the main problems from the nineteenth century.
Thermodynamic and Thermophysical Properties of Saline Water: Models, Correlations and Data for Desalination and Relevant Applications (Springer Water)
by Naef A. Qasem Muhammad M. Generous Bilal A. Qureshi Syed M. ZubairThis book accommodates the existing correlations, data, and methods for thermodynamic and thermophysical properties of saline water, including multiple components at a wide range of salinity (reaching around 200 g/kg), temperature, and pressure. The correlations of each property are plotted against existing experimental data to judge the comparative accuracy of each within a given specific range of salinity, temperature, and pressure. An assessment to recommend some correlations is also conducted. New correlations for some properties are also proposed. This book helps to provide the saline water properties as needed for engineers, designers, and research for different areas, including desalination and water treatment.All the analytical analysis, thermodynamic analysis, and design models of the desalination technologies depend on saline water properties. As scientists and researchers working on different desalination technologies, the authors found it difficult to find all saline water properties in one source, including multicomponent and binary salty solutions, under different conditions (salinity, temperature, and pressure). Therefore, the authors introduce this book to fill the gap in the open literature. This book compiles the thermodynamic and thermophysical properties of saline water, involving thermodynamic approaches, multicomponent models, and simple correlations and data, comparison between the correlations of properties in figures, recommendation of the most accurate correlations and methods, and the used codes to estimate these correlations and methods. It is expected that this book to be a principal source for all interests in desalination and water treatment subjects.
Thermodynamic and Transport Properties of Fluids
by G. F. Rogers Y. R. MayhewThe fifth edition has been issued to incorporate two new tables - Data of Refrigerant 134a and a table containing for selected substances, molar enthalpies and molar Gibbs functions of formation, Equilibirum constants of formation, as well as molar heat capacities and absolute entropies.
A Thermodynamic Approach to Water Geothermometry (Springer Geochemistry)
by Roberto Cioni Luigi MariniThis book explores water geothermometry, a highly relevant topic in the exploration and exploitation of geothermal energy. Presenting theoretical geothermometers and indicators of CO2 fugacity, it describes a rigorous new approach entirely based on thermodynamics. The book will appeal to geothermal geoscientists, especially those working in research institutions and companies around the globe. It is also of interest to students on advanced courses in applied geochemistry, water–rock interaction and other related areas.
Thermodynamic Cycles: Computer-Aided Design and Optimization (Chemical Industries Ser. #Vol. 99)
by Chih WuThis reference illustrates the efficacy of CyclePad software for enhanced simulation of thermodynamic devices and cycles. It improves thermodynamic studies by reducing calculation time, ensuring design accuracy, and allowing for case-specific analyses. Offering a wide-range of pedagogical aids, chapter summaries, review problems, and worked example
Thermodynamic Equilibrium and Stability of Materials
by Long-Qing ChenThis is a textbook on thermodynamics of materials for junior/senior undergraduate students and first-year graduate students as well as a reference book for researchers who would like to refresh their understanding of thermodynamics.The textbook employs a plain language to explain the thermodynamic concepts and quantities. It embraces the mathematical beauty and rigor of Gibbs thermodynamics through the fundamental equation of thermodynamics from which all thermodynamic properties of a material can be derived. However, a reader with basic first-year undergraduate calculus skills will be able to get through the book without difficulty. One unique feature of this textbook is the descriptions of the step-by-step procedures for computing all the thermodynamic properties from the fundamental equation of thermodynamics and all the thermodynamic energies from a set of common, experimentally measurable thermodynamic properties, supplemented with ample numerical examples.Another unique feature of this textbook is its emphasis on the concept of chemical potential and its applications to phase equilibria in single component systems and binary solutions, chemical reaction equilibria, and lattice and electronic defects in crystals. The concept of chemical potential is introduced at the very beginning of the book together with temperature and pressure. It avoids or minimizes the use of terms such as molar Gibbs free energy, partial molar Gibbs free energy, or Gibbs potential because molar Gibbs free energy or partial molar Gibbs free energy is precisely the chemical potential of a material or a component. It is the chemical potential that determines the stability of chemical species, compounds, and phases and their tendency to chemically react to form new species, transform to new physical state, and migrate from one spatial location to another. Therefore, it is the chemical potential differences or gradients that drive essentially all materials processes of interest. A reader after finishing reading the book is expected to not only achieve a high-level fundamental understanding of thermodynamics but also acquire the analytical skills of applying thermodynamics to determining materials equilibrium and driving forces for materials processes.
Thermodynamic Inversion
by Vladimir N. KompanichenkoThis book discusses the theory, general principles, and energy source conditions allowing for the emergence of life in planetary systems. The author examines the material conditions found in natural hydrothermal sites, the appropriate analogs of prebiotic environments on early Earth. He provides an overview of current laboratory experiments in prebiotic materials chemistry and substantiation of a new direction for the experiments in the origin of life field.Describes thermodynamic inversion and how it relates to the living cell;Examines the current direction of experiments on prebiotic materials chemistry;Introduces and substantiates necessary conditions for the emergence of life.
Thermodynamic Measurement Techniques (The Minerals, Metals & Materials Series)
by Mohammad ShamsuddinThis book offers various techniques for measurement of thermodynamic quantities of materials such as enthalpy, free energy, and entropy. Techniques described herein include calorimetry, chemical equilibria, vapour pressure, and electrochemical analysis. The book covers general and solution thermodynamics in Chapters 1 and 2, respectively, and highlights the significance of various thermodynamic quantities required for materials characterization and development in Chapter 3. The author goes on to discuss different thermodynamic measurement techniques in detail (Chapters 4-8) together with a set of more than fifty worked-out problems related to classical as well as solution thermodynamics and measurement techniques. (Chapter 9).Topics include but are not limited to the following:The significance of various thermodynamic data required for selection and characterization of materials.The physicochemical principles involved in various thermodynamic measurement and on the evaluation of thermodynamic data by phase diagram analyses. The unique combination of calorimetry and chemical equilibrium for simultaneous determination of partial molar enthalpy and partial molar free energy of hydrogen in metals and alloys.The special technique based on the combination of vapor pressure and electrical conductivity to study the effect of tellurium vapor pressure on the mode of conduction in polycrystalline cadmium telluride.
Thermodynamic Mechanism of MQL Grinding with Nano Bio-lubricant
by Changhe LiThis book discusses the thermodynamic mechanism of MQL grinding with nano-biological lubricant from the force, heat, surface integrity, and micro-morphology.It makes up the fatal defect of the lack of heat transfer capability of traditional MQL grinding. The machining accuracy, surface quality, especially surface integrity of the workpiece, are significantly improved; at the same time, the service life of the grinding wheel is increased and the working environment is improved.The general scope of the book’s content is the effects of MQL grinding with nano-bio-lubricant on grinding force, thermal mechanism, and surface.It provides a new method of sustainable green grinding for environment-friendly, resource-saving, and energy-efficient utilization and solves the technical bottleneck of the insufficient capacity in MQL heat transfer.
Thermodynamic Modeling of Solid Phases
by Michel SoustelleThe book offers advanced students, in 7 volumes, successively characterization tools phases, the study of all types of phase, liquid, gas and solid, pure or multi-component, process engineering, chemical and electrochemical equilibria, the properties of surfaces and phases of small sizes. Macroscopic and microscopic models are in turn covered with a constant correlation between the two scales. Particular attention was given to the rigor of mathematical developments. Besides some very specialized books, the vast majority of existing works are intended for beginners and therefore limited in scope. There is no obvious connection between the two categories of books, general books does not go far enough in generalizing concepts to enable easy reading of advanced literature. The proposed project aims to give readers the ability to read highly specialized publications based on a more general presentation of the different fields of chemical thermodynamics. Consistency is ensured between the basic concepts and applications. So we find, in the same work, the tools, their use and comparison, for a more general macroscopic description and a microscopic description of a phase.
Thermodynamic Processes 1: Systems without Physical State Change
by Salah BelaadiThermodynamic Processes 1 offers a comprehensive take on process engineering, whereby technology transforms materials and energy production into various products. The scientific methods required for designing such processes are the result of knowledge from a number of different disciplines. As a result, thermodynamics is the basic discipline in process engineering training. The application of laws and concepts of thermodynamics is essential before the design and optimization of any process, which allows downstream to control its reliability and validity. This book offers a pragmatic approach through practical and varied examples, chosen for their didactic and industrial interest.
Thermodynamic Processes 2: State and Energy Change Systems
by Salah BelaadiThermodynamic Processes 2 is devoted to the study of equilibrium between phases in the case of the four changes of physical state: fusion, boiling or vaporization, sublimation and allotropy or transition. It also includes a section that addresses energy's relationship to the zero sum aspect of exergy and thermal cycles. This second volume presents scientific and technical examples – both theoretical and industrial – which are the result of a careful selection, accrued over more than three decades of teaching thermodynamics and in collaboration with the industry sector. The didactic exercises and the practical problems are entirely dedicated to the understanding of this science, and the potential applications for the industrial world. This book is a tool for work and reflection essential for the student in training, as well as the engineer or experienced researcher.
Thermodynamic Properties Of Isomerization Reactions
by M. L. FrenkelThis handbook presents the thermodynamic functions obtained primarily from the results of equilibrium studies of isomerization reactions and by measurements of the heats of combustion of isomer groups by the calorimetric method.
Thermodynamic Weirdness: From Fahrenheit to Clausius
by Don S. LemonsAn account of the concepts and intellectual structure of classical thermodynamics that reveals the subject's simplicity and coherence. Students of physics, chemistry, and engineering are taught classical thermodynamics through its methods—a “problems first” approach that neglects the subject's concepts and intellectual structure. In Thermodynamic Weirdness, Don Lemons fills this gap, offering a nonmathematical account of the ideas of classical thermodynamics in all its non-Newtonian “weirdness.” By emphasizing the ideas and their relationship to one another, Lemons reveals the simplicity and coherence of classical thermodynamics. Lemons presents concepts in an order that is both chronological and logical, mapping the rise and fall of ideas in such a way that the ideas that were abandoned illuminate the ideas that took their place. Selections from primary sources, including writings by Daniel Fahrenheit, Antoine Lavoisier, James Joule, and others, appear at the end of most chapters. Lemons covers the invention of temperature; heat as a form of motion or as a material fluid; Carnot's analysis of heat engines; William Thomson (later Lord Kelvin) and his two definitions of absolute temperature; and energy as the mechanical equivalent of heat. He explains early versions of the first and second laws of thermodynamics; entropy and the law of entropy non-decrease; the differing views of Lord Kelvin and Rudolf Clausius on the fate of the universe; the zeroth and third laws of thermodynamics; and Einstein's assessment of classical thermodynamics as “the only physical theory of universal content which I am convinced will never be overthrown.”
Thermodynamics: Foundations and Applications (Dover Civil and Mechanical Engineering)
by Gian Paolo Beretta Elias P. GyftopoulosDesigned for both undergraduate and graduate students, this authoritative milestone in the foundational development of thermodynamics provides a unique reference for all physicists and engineers. Basic concepts and applications are discussed in complete detail with attention to generality and logical consistency, removing ambiguities and limitations of traditional presentations. Worked-out examples and end-of-chapter problems illustrate the use of energy and entropy balances as powerful analytical keystones in physics and engineering.The text provides material for undergraduate and graduate courses. At the introductory level, it covers heat engines, stable-equilibrium-state models for ideal-gas, incompressible-fluid and solid behaviors, heat, work and bulk-flow interactions, thermodynamic efficiency, energy conversion systems, energy, and availability/ At the intermediate level, it covers ideal and nonideal mixtures, chemical reactions, chemical equilibrium, and combustion.At the advanced level, the unique non-traditional order of exposition of the basic concepts and principles (system, property, state, process, first law, energy, equilibrium, stable equilibrium, second law, entropy) allows rigorous general definitions of energy and entropy valid for all systems (large and small, few- and many- particles) and all states (stable and non-stable equilibrium, as well as non-equilibrium). In particular, entropy is defined before and independently of the definitions of temperature and heat, and of the simple-system model for many-particle systems.
Thermodynamics: An Interactive Approach
by Subrata BhattacharjeeThermodynamics: An Interactive Approach employs a layered approach that introduces the important concepts of mass, energy, and entropy early, and progressively refines them throughout the text. To create a rich learning experience for today’s thermodynamics student, this book melds traditional content with the web-based resources and learning tools of TEST: The Expert System for Thermodynamics – an interactive platform that offers smart thermodynamic tables for property evaluation and analysis tools for mass, energy, entropy, and exergy analysis of open and closed systems. <p><p>Beside the daemons–web-based calculators with a friendly graphical interface–other useful TEST modules include an animation library, rich Internet applications (RIAs), traditional charts and tables, manual and TEST solutions of hundreds of engineering problems, and examples and problems to supplement the textbook. The book is written in a way that allows instructors to decide the extent that TEST is integrated with homework or in the classroom. <p><p>MasteringEngineering for Thermodynamics is a total learning package. This innovative online program emulates the instructor’s office―hour environment, guiding students through engineering concepts from Thermodynamics with self-paced individualized coaching.
Thermodynamics: An Engineering Approach
by Yunus A. Çengel Michael A. Boles Mehmet KanogluThe subject of thermodynamics deals with energy and has long been an essential part of engineering curricula all over the world. Its broad application area ranges from microscopic organisms to common household appliances, transportation vehicles, power generation systems, and even philosophy. This introductory book contains sufficient material for two sequential courses in thermodynamics, and students are assumed to have an adequate background in calculus and physics. A conscious effort is made to emphasize the basic principles of thermodynamics while also providing students with a perspective of how computational tools are used in engineering practice. The traditional classical, or macroscopic, approach is used throughout the text, with microscopic arguments serving in a supporting role as appropriate. This approach is more in line with students’ intuition and makes learning the subject matter much easier.
Thermodynamics: A Smart Approach
by Ibrahim DincerPresents a unique, stepwise exergy-based approach to thermodynamic concepts, systems, and applications Thermodynamics: A Smart Approach redefines this crucial branch of engineering as the science of energy and exergy—rather than the science of energy and entropy—to provide an innovative, step-by-step approach for teaching, understanding, and practicing thermodynamics in a clearer and easier way. Focusing primarily on the concepts and balance equations,this innovative textbook covers exergy under the second law of thermodynamics, discusses exergy matters, and relates thermodynamics to environmental impact and sustainable development in a clear, simple and understandable manner. It aims to change the way thermodynamics is taught and practiced and help overcome the fear of thermodynamics. Author Ibrahim Dincer, a pioneer in the areas of thermodynamics and sustainable energy technologies, draws upon his multiple decades of experience teaching and researching thermodynamics to offer a unique exergy-based approach to the subject. Enabling readers to easily comprehend and apply thermodynamic principles, the text organizes thermodynamics into seven critical steps—property, state, process, cycle, first law of thermodynamics, second law of thermodynamics and performance assessment—and provides extended teaching tools for systems and applications. Precise, student-friendly chapters cover fundamental concepts, thermodynamic laws, conventional and innovative power and refrigeration cycles, and more. This textbook: Covers a unique approach in teaching design, analysis and assessment of thermodynamic systems Provides lots of examples for every subject for students and instructors Contains hundreds of illustrations, figures, and tables to better illustrate contents Includes many conceptual questions and study problems Features numerous systems related examples and practical applications Thermodynamics: A Smart Approach is an ideal textbook for undergraduate students and graduate students of engineering and applied science, as well researchers, scientists, and practicing engineers seeking a precise and concise textbook and/or reference work.
Thermodynamics (Dover Books on Physics)
by Enrico FermiIndisputably, this is a modern classic of science. Based on a course of lectures delivered by the author at Columbia University, the text is elementary in treatment and remarkable for its clarity and organization. Although it is assumed that the reader is familiar with the fundamental facts of thermometry and calorimetry, no advanced mathematics beyond calculus is assumed.Partial contents: thermodynamic systems, the first law of thermodynamics (application, adiabatic transformations), the second law of thermodynamics (Carnot cycle, absolute thermodynamic temperature, thermal engines), the entropy (properties of cycles, entropy of a system whose states can be represented on a (V, p) diagram, Clapeyron and Van der Waals equations), thermodynamic potentials (free energy, thermodynamic potential at constant pressure, the phase rule, thermodynamics of the reversible electric cell), gaseous reactions (chemical equilibria in gases, Van't Hoff reaction box, another proof of the equation of gaseous equilibria, principle of Le Chatelier), the thermodynamics of dilute solutions (osmotic pressure, chemical equilibria in solutions, the distribution of a solute between 2 phases vapor pressure, boiling and freezing points), the entropy constant (Nernst's theorem, thermal ionization of a gas, thermionic effect, etc.).