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astronomy

John Prausnitz

John Prausnitz is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand John Prausnitz rather than just read about it. In short: John Michael Prausnitz (born January 7, 1928) is an emeritus professor of chemical engineering at the University of California, Berkeley. Prausnitz is a member of the National Academy of Sciences and the National Academy of Engineering for contributions to the thermodynamics of phase equilibria and its application to industrial process design.

Key takeaways

  • John Prausnitz belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect John Prausnitz to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of John Prausnitz from memory before moving on to harder problems.

Reference excerpt

John Michael Prausnitz (born January 7, 1928) is an emeritus professor of chemical engineering at the University of California, Berkeley. Prausnitz is a member of the National Academy of Sciences and the National Academy of Engineering for contributions to the thermodynamics of phase equilibria and its application to industrial process design. In 2003, he received the National Medal of Science for his work in molecular thermodynamics. He developed many of the activity coefficient models used for the design of major chemical plants.

Education Prausnitz was born in Berlin, Germany, on January 7, 1928. His father and his mother's stepfather were both Jewish doctors. In 1933, when the Nazi Party rescinded the licenses of Jewish doctors, they were able to continue to work because they had been Frontkämpfer, "front fighters," during World War I. In 1937, at age 9, Prausnitz emigrated with his parents and sister to the United States, where he had an uncle in Lynbrook, New York on Long Island. His father was able to practice medicine because his German medical license was recognized by the State of New York. Prausnitz lived briefly in Lynbrook, then in Manhattan, and Forest Hills, Queens. He attended Public School 101 in New York. In 1950, Prausnitz earned his B.Ch.E., a five-year degree, from Cornell University. In 1951, he received his M.S. in chemical engineering from the University of Rochester. He then joined Princeton University as a student of Richard H. Wilhelm. He was able to spend two summers working at the Brookhaven National Laboratory. Prausnitz received his Ph.D. in chemical engineering from Princeton University in 1955 after completing a doctoral dissertation titled "Liquid-phase turbulent mixing properties."

Career Prausnitz joined the College of Chemistry at the University of California, Berkeley in 1955, attracted by the work of Joel Hildebrand on mixtures and by the opportunity to help shape what was then a young department. Although he officially retired from teaching in the Department of Chemical Engineering in 2004, Prausnitz remains a Faculty Senior Scientist at the Lawrence Berkeley National Laboratory and a Professor of the Graduate School at Berkeley. Through his work on thermodynamics and phase behavior, Prausnitz has developed the field of molecular thermodynamics, relating macroscopic properties to those of single- and multi-atom molecules. He initiated work on a number of important models for phase equilibria and the analysis of mixtures of solids, fluids, and gases, including the NRTL, UNIQUAC, and UNIFAC models. He is recognized for his engineering-oriented approach to molecular thermodynamics and its application to industrial process design. During his career at Berkeley, Prausnitz published hundreds of scientific papers, monographs and books detailing his theoretical and experimental work. In 2011, the Journal of Chemical and Engineering Data published an issue as a Festschrift in his honor. At that time Prausnitz was credited with having published more than 760 articles, in 134 journals, with 421 different co-authors, from over twenty countries. Prausnitz was the founding editor of the Annual Review of Chemical and Biomolecular Engineering, working with it from 2008 to 2018. His books include Computer Calculations of Vapor−Liquid Equilibria (1967), the graduate textbook Molecular Thermodynamics of Fluid-Phase Equilibria (1969; 1986; 1999), and later editions of Regular and Related Solutions (1970) and The Properties of Gases and Liquids (1977; 1987; 2001). Prausnitz was also a supporter of the Leonardo Project, an initiative to connect sciences with society, art, and philosophy, inspired by Jacob Bronowski and The Ascent of Man. The project developed and shared multidisciplinary case studies, primarily for use in undergraduate classes.

Personal life John Prausnitz has a son, Mark Prausnitz, who is a professor at the Georgia Institute of Technology.

Awards Prausnitz was elected a member of the National Academy of Sciences in 1973 and the National Academy of Engineering in 1979 for contributions to the thermodynamics of phase equilibria and its application to industrial process design. He was elected to the American Academy of Arts and Sciences in 1988. Prausnitz has been given many awards, from the Colburn Award of the American Institute of Chemical Engineers (AIChE) in 1962 to the National Medal of Science for his work in engineering-oriented molecular thermodynamics in 2003. In 2012, he received the Lifetime Achievement in Chemical Engineering Pedagogical Scholarship, given by the American Society for Engineering Education. As of 2016, the American Institute of Chemical Engineers renamed the Institute Lecturer Award in his honor as the John M. Prausnitz AIChE Institute Lecturer Award.

References

Worked examples

Example 1 — a first encounter with John Prausnitz

Start with the simplest possible case. Write down what John Prausnitz claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to John Prausnitz before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about John Prausnitz ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of John Prausnitz

In research
John Prausnitz appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses John Prausnitz in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
John Prausnitz is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1928 births, American chemical engineers, Annual Reviews (publisher) editors, so understanding it makes those chapters shorter.
In everyday life
Look for John Prausnitz outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study John Prausnitz in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what John Prausnitz means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain John Prausnitz out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is John Prausnitz in simple terms?

John Michael Prausnitz (born January 7, 1928) is an emeritus professor of chemical engineering at the University of California, Berkeley. Prausnitz is a member of the National Academy of Sciences and the National Academy of Engineering for contributions to the thermodynamics of phase equilibria and…

Why does John Prausnitz matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study John Prausnitz?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on John Prausnitz.

Tags

  • 1928 births
  • American chemical engineers
  • Annual Reviews (publisher) editors
  • Cornell University alumni
  • Fellows of the American Academy of Arts and Sciences
  • Living people
  • Members of the United States National Academy of Engineering
  • National Medal of Science laureates
  • Princeton University alumni
  • UC Berkeley College of Chemistry faculty
  • University of Rochester alumni

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