In the Italian Renaissance, the idea of the polymath was expressed by Leon Battista Alberti (1404–1472) in the statement that "a man can do all things if he will". Polymaths include the great scholars and thinkers of the Renaissance and Enlightenment, who excelled at several fields in science, technology, engineering, mathematics, and the arts. Use in English of the similar term polyhistor dates from the late 16th century. The earliest recorded use of the term in the English language is from 1624, in the second edition of The Anatomy of Melancholy by Robert Burton the form polymathist is slightly older, first appearing in the Diatribae upon the first part of the late History of Tithes of Richard Montagu in 1621. Von Wowern lists erudition, literature, philology, philomathy and polyhistory as synonyms. ranging freely through all the fields of the disciplines, as far as the human mind, with unwearied industry, is able to pursue them". Von Wowern defined polymathy as "knowledge of various matters, drawn from all kinds of studies . In Western Europe, the first work to use the term polymathy in its title ( De Polymathia tractatio: integri operis de studiis veterum) was published in 1603 by Johann von Wowern, a Hamburg philosopher. He was one of the Founding Fathers of the United States.Ī polymath ( Greek: πολυμαθής, polymathēs, "having learned much" Latin: homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific problems. Franklin was a writer, scientist, inventor, statesman, diplomat, printer and political philosopher. To answer these questions we need to see how a varies with these parameters.Benjamin Franklin is one of the foremost polymaths in history. (See Critical Thinking in Preface Table P1 and P2 on pages xvi and xvii. "If we double the particle size, decrease the porosity by a factor of 3, andĭouble the pipe size, what will happen to D P and X?" We want to learn how the various parameters (particle diameter, porosity, etc.) affect Later on in the course, we will learn that effectiveness factor decreases as the particle size increasesĮngineering Analysis - Critical Thinking and Creative Thinking Therefore, there are more entry ways into the catalyst particle. For a given catalyst weight, there is a greater external surgace area for smaller particles than larger particles. The larger the particle, the more time it takes the reactant to get in and out of the catalyst particle. The specific reaction rate decreases as the particle size increases, therefore so deos the conversion. Increasing the particle diameter descreases the pressure drop and increases the rate and conversion. We will use this form for multiple reactions: Need to find (P/P 0) as a function of W (or V if you have a PFR). Must use the differential form of the mole balance to separate variables Note: Pressure drop does NOT affect liquid phase reactionsĪnalyze the following second order gas phase reaction that occurs isothermally in a The correspondingĪ volume of 94 dm 3 (rounding up from slightly more than One could then use Polymath to determine the volume of the PFR. Please try using a different browser or updating your current browser. Sorry, your browser does not support the audio tag. Given that the system is gas phase and isothermal, determine the Calculating the Equilibrium Conversion (X e) for a Constant Volume SystemĮxample: Determine X e for a PFR with no pressure
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