Chem209_2007FinalExam

Chem209_2007FinalExam - CHEMISTRY 209 FINAL EXAM Your...

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CHEMISTRY 209 FINAL EXAM December 10, 2007 Your Name: ( Please print ) Last First CORNELL NetID Day and Time of Your Lab-Recitation Section: Lab-Recitation TA: Complete academic integrity is expected of all students of Cornell University at all times, whether in the presence or absence of members of the faculty or teaching staF. Understanding this, I declare that I shall not give, use, or receive unauthorized aid in this examination. Your Signature: There are 7 (many of them multipart) questions and a total of 15 pages (including this cover sheet, a blank page after all the questions, a periodic table and a page of potentially useful facts at the end). Make sure that your examination booklet is complete. The ±nal is not designed with the idea that all, or necessarily any of you, will complete each and every question; rather, it provides a menu covering many di²erent areas of relevance to the course, and I expect that each of you should have something substantial to say about most of those areas. Write your answers directly on these sheets. Use the blank page, or if necessary the backs of pages, but clearly indicate on the problem page where work can be found. If you need to include additional pages, please attach them securely to the rest of the test book. Be brief, concise, and neat. Include only material pertinent to the question asked. Proctors are not allowed to interpret questions for you. In case of doubt, indicate the assumptions on which your answer is based. Pay attention that the signi±cant ±gures reported in your answers are not unreasonable. You may leave when you are ±nished, but please do so quietly after turning your paper. Question 1. (25) Question 2. (20) Question 3. (20) Question 4. (20) Question 5. (25) Question 6. (20) Question 7. (20) Total (150) Show your work! (Unless you don’t care to receive partial credit). 1
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1. (a) (9 points) Consider three identical flasks flled with diFerent gases: ±lask A: CO at 760 torr and 0 C ±lask B: N 2 at 250 torr and 0 C ±lask C: H 2 at 100 torr and 0 C i. In which flask will the molecules have the greatest average kinetic energy? ii. In which flask will the molecules have the greatest root mean square velocity? iii. In which flask will there be the greatest ²requency o² collisions between gas molecules and the wall o² the flask?
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This note was uploaded on 02/17/2009 for the course CHEM 2090 taught by Professor Zax,d during the Fall '07 term at Cornell.

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Chem209_2007FinalExam - CHEMISTRY 209 FINAL EXAM Your...

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