Monthly Archives: January 2013

Mpemba Effect

Since we have started discussing solid liquid and liquid gas transformations (and their opposites), here’s an interesting empirical observation that is yet to be explained clearly and convincingly: Mpemba effect. From Wikipedia: The Mpemba effect, named after Tanzanian student Erasto … Continue reading

Posted in History, Thermo | Leave a comment

Josiah Willard Gibbs

In thermodynamics, we find all kinds of important named concepts and equations that go back to this great American scientist of the nineteenth century (some people even go so far as to say he is the greatest American scientist, ever). … Continue reading

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Heat

Since we deal with heat in thermodynamics, let us try to see what this quantity really is. Our first and most frequent encounter with heat is through hot and cold objects that we come in contact with in our daily … Continue reading

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Equilibrium

1. Irreversibility may be measured by the amount of entropy production. 2. Let us look at a modified version of our previous example: Consider the two subsystems as separate systems. Now System I is at 300 K and System II … Continue reading

Posted in Spring 2013, Thermo | Leave a comment

Hello, entropy!

I think it is best to plunge right in by starting with entropy. But, first, some preliminaries. In thermodynamic analysis, we focus our attention on certain quantity of matter (called a system) in a box. The box walls constitute the … Continue reading

Posted in Spring 2013, Thermo | Leave a comment

Welcome to Thermo

A quick recap of the first real class today. We will use DeHoff and Gaskell as the official text books. There are many other texts available, and you are welcome to consult any of them. The primary focus will be … Continue reading

Posted in Spring 2013, Thermo | Leave a comment