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Please define your terms.

I've had a shaky grasp on thermodynamics ever since taking P-Chem and University Physics at the same time, because the stupid conventions are different. Apparently chemists are interested in how much work you have to put in to the system to make the reaction go, and physicists (at least the ones who wrote the text we used) are interested in how much work you can get out of the system when the reaction does go, so they invert the signs. Try holding two different and incompatible versions of the same equations in your head at the same time, and you'll begin to understand my confusion.

If I'm remembering properly, in chemical terms a negativeenthalpy change indicates that the reaction is thermodynamically favored (i.e. exothermic).

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Q: Do reactions favor positive or negative enthalpies?
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