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Entropy and Life

Hey Tim,
Remember that wiki article you linked me to?  Maybe we could discuss it in the comments of this link.  Sound good?

Comments

Leo White said…
Lemmee kick off, with the hope you'll pick up.
For starters, the equation by McCulloch doesn't mean anything to me: what's dQ?
Unknown said…
Hey Leo,

The equations aren't really important in that article. dX (where X in any variable) is essentially synonymous with delta_x, or change in X. dX means a small change in X. Technically, dX is an infinitesimally small change in X - this assumption is the basis of calculus. What that equation means in words is that if you add a small amount of heat energy to a closed system otherwise kept at constant temperature, you will likely contribute to it's disorder. This, if I hold an ice cube and put a lighter by it (adding the dQ), some of it will melt into water - thus ruining its order and increasing its entropy (corresponding to an increase in S on the other side of the equation).
Leo White said…
Yeah, and if you hold the ice cube with your fingers you're gonna burn your bloomin' hand off...
Leo White said…
Okay, I'll try to get back to the article...

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