Review for prelim 1 - Syud Ahmed CHEM 208 PRELIM 1 REVIEW...

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Syud Ahmed CHEM 208 : PRELIM 1 REVIEW Saturday, Feb 23 rd , 2008 [email protected] This session is designed to review some of the important topics you have covered so far in the semester. Unfortunately, it does not encompass all the material you may be tested on in the first Prelim. I suggest you DO NOT make the mistake of only studying the topics covered during this session, but also go over your notes, problem sets, and the suggested problems. 1. 44g of propane is completely combusted in a homemade aluminum calorimeter. (a) Use the table of bond dissociation energies to find the enthalpy change of the reaction. Is the process exothermic or endothermic? (Table on last page) (b) Suppose there is no heat loss to the surroundings. Given that the mass of the aluminum calorimeter is 141.5 kg, and that the temperature increases from 28.5 o C to 55.0 o C, find the molar heat capacity of aluminum. McLovin says: There is a very good reason for why my fake I.D. says I’m 25 and not 21. Everyday hundreds of kids go to the liquor store with fake I.D.s that say they’re 21. Just how many 21-year-olds are there in this town? It’s called strategy. You better have one for this exam as well.
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2. You are given a bottle of an unknown liquid. The label reads:
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