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In thermodynamics, a quasi-static process is a thermodynamic process that happens slowly enough for the system to remain in internal equilibrium. An example of this is quasi-static compression, where the volume of a system changes at a slow rate enough to allow the pressure to remain uniform and constant throughout the system. The processes which allow all isothermal and adiabatic operations to proceed very slowly are known as quasi-static processes.
Quasi means ‘almost’. This process is a succession of equilibrium states and infinite slowness is its characteristic feature. 
Daniel Schroeder Thermal Physics Pdf
Any reversible process is a quasi-static one. However, quasi-static processes involving entropy production are not reversible. An example of a quasi-static process that is not reversible is a compression against a system with a piston subject to friction—although the system is always in thermal equilibrium, the friction ensures the generation of dissipative entropy, which directly goes against the definition of reversible. A notable example of a process that is not even quasi-static is the slow heat exchange between two bodies on two finitely different temperatures, where the heat exchange rate is controlled by an approximately adiabatic partition between the two bodies—in this case, no matter how slowly the process takes place, the states of the two bodies are never infinitesimally close to equilibrium[clarification needed], since thermal equilibrium requires that the two bodies be at the same temperature.
Some ambiguity exists in the literature concerning the distinction between quasi-static and reversible processes, as these are sometimes taken as synonyms. The reason is the theorem that any reversible process is also a quasi-static one, even though (as we have illustrated above) the converse is not true. In practical situations, it is essential to differentiate between the two: any engineer would remember to include friction when calculating the dissipative entropy generation, so there are no reversible processes in practice. The definition given above is closer to the intuitive understanding of the word “quasi-” (almost) “static”, and remains technically different from reversible processes.
PV-Work in various quasi-static processes
Constant pressure: Isobaric processes,
Constant volume: Isochoric processes,
Constant temperature: Isothermal processes,
where P varies with V via , so
^Schroeder, Daniel (2000). An Introduction to Thermal Physics. United States: Addison Wesley Longman. pp. 20–21. ISBN0-201-38027-7.
^Quasi-static process in thermodynamics by R.K. Rajput. 'What is Quasi-static process?'
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Quasistatic_process&oldid=900906156'
Download Free An Introduction To Thermal Physics Book in PDF and EPUB Free Download. You can read online An Introduction To Thermal Physics and write the review.
Thermal Physics Schroeder Pdf Download Windows 7
This text provides a balanced, well-organized treatment of thermodynamics and statistical mechanics, making thermal physics interesting and accessible to anyone who has completed a year of calculus-based introductory physics. Part I introduces essential concepts of thermodynamics and statistical mechanics from a unified view, applying concepts in a select number of illustrative examples. Parts II and III explore further applications of classical thermodynamics and statistical mechanics. Throughout, the emphasis is on real-world applications.
This textbook is intended for introductory courses in physics, engineering and chemistry at universities, polytechnics and technical colleges. It provides either an elementary treatment of thermal physics, complete in itself, for those who need to carry the subject no further, or a sound foundation for further study in more specialised courses. The author gives a clear and concise account of those basic concepts that provide the foundations for an understanding of the thermal properties of matter. The area covered corresponds very roughly to the traditional topics of heat, kinetic theory, and those properties of matter for which there are elementary explanations in terms of interatomic forces. The book is not concerned with experimental detail but with ideas and concepts, and their quantitative application through simple models. The author provides many problems for which the answers are included. The book should also be useful in teacher training and as a reference book in the libraries of schools where pupils are being prepared for tertiary courses.
Concepts and relationships in thermal and statistical physics form the foundation for describing systems consisting of macroscopically large numbers of particles. Developing microscopic statistical physics and macroscopic classical thermodynamic descriptions in tandem, Statistical and Thermal Physics: An Introduction provides insight into basic concepts at an advanced undergraduate level. Highly detailed and profoundly thorough, this comprehensive introduction includes exercises within the text as well as end-of-chapter problems. The first section of the book covers the basics of equilibrium thermodynamics and introduces the concepts of temperature, internal energy, and entropy using ideal gases and ideal paramagnets as models. The chemical potential is defined and the three thermodynamic potentials are discussed with use of Legendre transforms. The second section presents a complementary microscopic approach to entropy and temperature, with the general expression for entropy given in terms of the number of accessible microstates in the fixed energy, microcanonical ensemble. The third section emphasizes the power of thermodynamics in the description of processes in gases and condensed matter. Phase transitions and critical phenomena are discussed phenomenologically. In the second half of the text, the fourth section briefly introduces probability theory and mean values and compares three statistical ensembles. With a focus on quantum statistics, the fifth section reviews the quantum distribution functions. Ideal Fermi and Bose gases are considered in separate chapters, followed by a discussion of the 'Planck' gas for photons and phonons. The sixth section deals with ideal classical gases and explores nonideal gases and spin systems using various approximations. The final section covers special topics, specifically the density matrix, chemical reactions, and irreversible thermodynamics.
A standard text combining statistical physics with thermal phenomena, this book presents a unified approach to provide a deeper insight into the subject and to bring out the subtle unity of statistical mechanics and thermodynamics. Suitable as a text for undergraduate courses in physics. KEY FEATURES • Presents a new pedagogical approach introducing macroscopic (classical) thermodynamics through the statistical mechanics. This new approach is increasingly sought to be introduced worldwide. • Magnitudes of physical quantities under discussion are emphasized through worked-out examples. • Questions and exercises are interspersed with the text to help students consolidate the learning. • Techniques developed in this course are applied to actual modern situations. • Many topics are introduced through the problems to help inculcate self-study.
Schroeder Thermal Physics 1.16
This fully updated and expanded new edition continues to provide the most readable, concise, and easy-to-follow introduction to thermal physics. While maintaining the style of the original work, the book now covers statistical mechanics and incorporates worked examples systematically throughout the text. It also includes more problems and essential updates, such as discussions on superconductivity, magnetism, Bose-Einstein condensation, and climate change. Anyone needing to acquire an intuitive understanding of thermodynamics from first principles will find this third edition indispensable. Andrew Rex is professor of physics at the University of Puget Sound in Tacoma, Washington. He is author of several textbooks and the popular science book, Commonly Asked Questions in Physics.