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HS ChemistryPublished: Mon, 01 May 2006 09:00:00 -0400 Im not having fun anymore, I think to myself, as I pour over my chemistry textbook to prepare for next weeks class. The topic is thermodynamics; the module, number thirteen, and Dr. Wile, the textbook's wonderful author, covers a lot of ground in its thirty-three pages. Sub-topics relating to thermodynamics include kinetic energy and potential energy, how they relate to matter itself and to each other, followed by a lengthy discussion of enthalpy and how to calculate it. Notes on entropy, how it relates to enthalpy, and Gibbs Free Energy bring up the rear. While still finishing up module twelve, I skipped ahead and gave module thirteen a cursory overlook like a naughty child opening a present on Christmas Eve. From the onset, this module looked like a piece of cake. "Sure, its got a few scary terms and a lot of tables," I thought to myself, "But cmon, Ive been through twelve of these suckers. This one cant be that much worse."
Evidently, first impressions aren't what they're made out to be, as I soon found out. My attitude towards the thirteenth module quickly changed as we delved into it with full-force, having jettisoned ourselves from the safe confines of the previous module. Enthalpy and the change in enthalpy of a chemical reaction made no sense to me, and my frustration at this rose while my previous confidence in my abilities to understand whatever chemistry class had to offer diminished with equal speed. To me, enthalpy was magic, a philosophical construct meant to induce mental agony in students who sincerely tried their hardest to understand it. As the module progressed, things got a little better. The introduction of new and difficult concepts lessened and then stopped altogether as a major experiment approached. By doing the experiment and writing its lab report, I got a shaky grasp on the topics at hand. My handhold got a little stronger as the text picked up speed again and introduced another way to determine the change in enthalpy of a chemical reaction. This new approach made complete sense to me, and I flew through this material very quickly as if on a tricycle riding down the side of a hill. I should have prepared myself for what was to come at the bottom, though, with the knowledge that pleasant hillsides must eventually flatten off and head back up from whence they came.
As I continued reading through module
thirteen, the shadow of another beast-like concept meant to fry my
brain drew nearer by the paragraph. Before I begin this section, Dr.
Wile said as means of introduction to the concept he would soon
unleash upon his unsuspecting students, I think it is necessary to
warn you that the discussion which follows gets a little deep. At
first, I took this to mean that I would simply have to
pay very close attention to what he said in order to understand
it. This excited me, as I enjoy being challenged in various ways, but I
was in no way prepared for what was to come. The text suddenly filled
with such crazy concepts as Hesss Law, state functions, enthalpy of
formation, and others. In the quagmire of this discussion that seemed
a whole lot more like a cruel form of mental torture, I slowly pinned
Hesss Law and state functions to the ground, breathing hard for a
moment before lurching forward to do the same with enthalpy of
formation. This concept gave me much more trouble, and we arm-wrestled
together for a much longer time. He proved much stronger than I in the
end, however, and so, after a few more moments of incapacitating pain,
I cried uncle, and he let me go.
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