Typical depiction of the energy dispersal view of entropy, wherein it is argued that the second law of thermodynamics states that concentrated forms of energy, such as a packed ordered grouping of atoms or molecules (low entropy state), tend to spread out over time, towards that of the most probable or uniform state, often towards the most disordered state (high entropy state). |
“Finding grossly erroneous incorrect information in introductory chemistry texts is like finding sand at the beach.”
Excerpt of a Lambert-influenced description of entropy and the second law from the fourth edition 2008 college chemistry textbook Chemistry in Focus by American chemist Nivaldo Tro, in which the second law is defined, incorrectly, as the tendency for “energy to become more spread out in any spontaneous process” and that another word for entropy is “energy dispersal” (or energy randomization). [9] |
“Here’s a brief of my sad story: Never liking thermo, except for the power of the Gibbs free energy relationship, and never having to teach it, I was asked to develop a chem course for non-science majors that would have more meaningful content and interest than any watered-down general chem. I came up with ‘Enfolding Entropy’, essentially a baby thermo course with minimal math. Marvelous fun for years. Good kids. In a very thorough ‘entropy via order-disorder’ that led to its (mis)application to human affairs in the last week or even two. I felt a bit uncomfortable. But not much. I put that aside because the students really could grasp why it required energy to produce hydrogen from water, and the problems in ammonia synthesis, etc., etc.”
“After my second retirement, from a fascinating non-academic career [advisor for the J. Paul Getty Museum, 1981-2002], I had time to think. I began to wonder why Clausius’ q/T had begun to be applied to shuffled cards and, to start, I checked some history. Clausius, Boltzmann, Planck, and Gibbs, then Shannon and Jaynes – and things began to clear. My first paper on shuffled cards as unrelated to entropy change caused the deletion of this silly example – my point of view (POV) of 1999 is now the shared wisdom of all but one chemistry textbooks published since 2004 , whereas in 1999, it was the principal illustration of entropy increase in most general chemistry textbooks. In 2002, my POV discovery was that ‘disorder’ was a valiant try by Boltzmann but an untenable view because of his limitation to 1898 knowledge (prior to the Third Law, quantum mechanics, and full understanding of the energetic behavior of molecules).”
“That seemingly personal POV of 2002 has, by 2006, resulted in the deletion of “entropy is related to disorder” from the great majority of new chemistry texts – including those in physical chemistry (although I can claim my direct influence in only two physical chemistry texts). This is perhaps an unprecedented rate of change in an ‘accepted’ concept in texts. It is not my famous name or power in the establishment that caused a total of 25 or so authors and hundreds of text reviewers to change their views! I am just the lucky guy who belled a giant cat that most chemist-authors had known was dead but wanted somebody else to say so.”
“Mistakenly thinking that [I] could shorten [my] grad school work, [I] was admitted to Kistiakowsky’s thermodynamics course for graduate students. Its difficulty sealed [my] decision to become an organic chemist rather than a physical chemist.”
“I think you are doing untold (but hopefully minor) damage to the teaching of entropy with your jihad against the word 'disorder' and insistent on relating everything to energy dispersal.”