rm111307

# rm111307 - CH301 Random Musings-Every Problem for the Rest...

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November 13, 2007: CH301 Random Musings—Every Problem for the Rest of the Course 1. Southpark does thermodynamics. You don’t produce two college age males without watching a lot of Southpark. So you can imagine my dismay, when about four years ago, mid-November, 2002, while watching episode 612, The Death Camp of Tolerance, I was deeply saddened to hear the following, utterly shocking statement from Mr. Garrison: [South Park Elementary, day, Garrison's class. Mr. Garrison enters, having previously set up a chemistry experiment on the teacher's desk.] Mr. Garrison: Okay, children, let's take our seats. Uh, apparently, none of you tried to get me fired yesterday, so I guess we're just gonna have to go on and learn more today. [sits on a corner of the desk] Now who can tells me what happens to water when we heat it up in the Bunsen burner? Butters: It evaporates. Mr. Garrison: Good, Butters. Now if we take the glass tube of the Bunsen burner, we can also see how other things react. [takes the tube in hand and walks over to Mr. Slave] Evaporation is an exothermic reaction, so let's look at an endothermic one…. . Now the problem here is Mr. Garrison wasn’t “being the system”. If you will “be the system” you realize that water evaporating is an endothermic process, because you are adding heat to the system ( Δ H is positive.) He should have said Evaporation is an endothermic physical process Anyway, you know it is hard enough trying to get students to “be the system” without having it contradicted by cable television. So very sad. 2. Quiz 5 is next Tuesday before Thanksgiving during class. The question types are presented below: Bomb calorimeter calculation Δ H f o or bond energy to calculate enthalpy changes Work calculation Sign convention Predicting entropy change Temperature dependence of Δ G Ranking: Statistical thermodynamics, ranking molar entropy in a compound Calculation: Statistical thermodynamics, Boltzmann formula calculation Being able to do worksheets 11 and 12 should more than prepare you for this quiz. 3. Class if moving for this Thursday only. I have agreed to let my class time on Thursday be given over to preparing for a famous visiting speaker. So famous, in fact, that I have to clear out at 2 even though the event isn’t until 5 pm. Whatever. So my CH302 class will meet in Payne Theatre in the Department of Theatre and Dance Winship Bldg. I have not been in the Winship Bldg in my 20 years on campus so this is a pretty big day for me too. To get to the building you walk east (toward I35) past the MLK Statue on the East Mall--Winship is the building to the north of the bus turnaround and east of the Jackson School. 4.

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rm111307 - CH301 Random Musings-Every Problem for the Rest...

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