<div dir="ltr"><p>Personally, I found it easier to learn about entropy by starting from thermodynamics and then later trying to grok the statistical mechanical perspective. Maybe start with a good thermodynamics textbook? A couple of popular science options are Hanlon’s <em>Block by Block</em> and Atkins’ <em>Thermodynamics</em> in the <em>Very Short Introduction</em> series. If you want something with more teeth, try Steane’s <i>Thermodynamics: </i><em>A Complete Undergraduate Course</em>. I particularly like his financial analogy: being given $1 as a dollar bill versus as 100 cents hidden around your house. It’s completely equivalent from a first-law perspective, not so much from a second-law perspective.</p><p>Cheers,</p><p>—Robert</p></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sat, Dec 28, 2024 at 4:14 PM Nicholas Thompson <<a href="mailto:thompnickson2@gmail.com">thompnickson2@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>FWIW, I have been struggling with the concept of entropy for the last month. One of the puzzles was why entropy increased with addition of heat. I bullied George for a few hours and he finally admitted not only that the mean and variance of the B-distribution are correlated, but that its variance is the square of its mean. Why that is the case is beyond both of us.<br></div><div><br></div><div>He also coughed up eventually the reason that adiabatic compression and decompression don't alter entropy: there is a trade off between spatial constraint and kinetic energy such that as the gas is confined its kinetic energy goes up and with that a compensating increase in the variance of the KE. <br></div><div><br></div><div>Yeah. I know. Fools rush in where wise men fear to tread. <br></div><div><br></div><div>N<br clear="all"></div><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Nicholas S. Thompson</div><div>Emeritus Professor of Psychology and Ethology</div><div>Clark University</div><div><a href="mailto:nthompson@clarku.edu" target="_blank">nthompson@clarku.edu</a></div><a href="https://wordpress.clarku.edu/nthompson" target="_blank">https://wordpress.clarku.edu/nthompson</a></div></div></div>
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