CHEM 205 2004FINAL - 1 CHEMISTRY 205 (Physical Chemistry) -...

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1 CHEMISTRY 205 (Physical Chemistry) - Final Examination - April 16, 2004 Time: 2.5 hours FIRST NAME: FAMILY NAME: (PRINT, CAPITALS) STUDENT NUMBER: SIGNATURE: _____ ______ THIS EXAMINATION CONSISTS OF 12 NUMBERED PAGES. PLEASE CHECK THAT YOU HAVE A COMPLETE EXAMINATION PAPER. PAGES 11 AND 12 ARE INFORMATION PAGES AND MAY BE SEPARATED FROM THE REST OF THE EXAM. Attempt ALL NINE (9) questions. Provide appropriate UNITS for all numerical answers. SHOW ALL WORK AND REASONING IN YOUR ANSWER. All work must be presented in this booklet. Use the backs of pages for rough calculations. THE USE OF GRAPHING CALCULATORS IS NOT PERMITTED. ALL MEMORIES ON ALL OTHER TYPES OF CALCULATORS MUST BE EMPTY. TURN OFF AND PUT AWAY ALL ELECTRONIC DEVICES OTHER THAN AN ALLOWED CALCULATOR. Please identify your section 208 Dr Chen MWF 8 am 210 Dr Chen MWF 10 am 203 Dr. Kast MWF 3 pm 288 Dr Burtnick TTh 8 am 222 Dr Burnell TTh 2 pm Question Maximum Mark 1 16 2 18 3 16 4 10 5 6 6 8 7 14 8 15 9 17 EXAM 120 RULES GOVERNING EXAMINATIONS 1. EACH CANDIDATE SHOULD BE PREPARED TO PRODUCE, UPON REQUEST, HIS/HER LIBRARY/AMS CARD. 2. READ AND OBSERVE THE FOLLOWING RULES: No candidate shall be permitted to enter the examination room after the expiration of one-half hour, or to leave during the first half-hour of the examination. Candidates are not permitted to ask questions of the invigilators, except in cases of supposed errors or ambiguities in examination questions. CAUTION - Candidates guilty of any of the following, or similar, dishonest practices shall be immediately dismissed from the examination and shall be liable to disciplinary action. (a) Making use of any books, papers or memoranda, other than those authorized by the examiners. (b) Speaking or communicating with other candidates. (c) Purposely exposing written papers to the view of other candidates. The plea of accident or forgetfulness shall not be received.
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2 1. At 15.6 o C, a system comprising 0.35 moles of a perfect gas expands from 1.2 to 7.4 L. For the system, determine w (in joules), q, Δ U, and Δ S if the expansion occurs isothermally against a constant external pressure of 1.00 atm. Enter your answers into the table at the bottom of the page. In addition, determine Δ S surr for the surroundings. State whether the process as described is spontaneous and explain your answer. sign (+/ ) number units w = J q = Δ U = Δ S = Δ S surr = Argument for or against spontaneity:
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3 2. The following information applies at 1.00 atm pressure and 25 ˚C for each of the pure gases: NH 3 (g) N 2 (g) H 2 (g) Δ H f , 298 0 ( kJ mol 1 ) 46.0 S 298 0 ( J
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This note was uploaded on 07/12/2008 for the course CHEM 205 taught by Professor Burnell during the Winter '07 term at The University of British Columbia.

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CHEM 205 2004FINAL - 1 CHEMISTRY 205 (Physical Chemistry) -...

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