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2008 - questions

2008 - questions - McGILL UNIVERSITY FACULTY OF SCIENCE...

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McGILL UNIVERSITY FACULTY OF SCIENCE CHEMISTRY 203 MIDTERM EXAM (2 HOURS) Examiner: Dr. W.C. Galley Oct. 17, 2008 6:00 - 8:00 PM INSTRUCTIONS TO STUDENTS 1. There are 6 questions on the exam. Answer #1→4 and 5 or 6, in a McGill exam booklet. The value of each question is indicated in the left-hand margin. The total value of the exam is 50 marks. 2. There are 2 pages to the examination not including the title and data pages. 3. Calculators without alphanumeric memory and a French-English dictionary are permitted. 4. No other external information, e.g. pages of formulae are permitted. 5. Queries on the marking will not be considered for exams written in pencil.
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CONSTANTS R(gas constant) .................................................................. 8.314 J mol -1 K -1 ................................................................... 0.082 l atm mol -1 K -1 h(Planck’s constant ............................................................ 6.63x10 -34 J s N o (Avogadro’s number) ..................................................... 6.023x10 23 mol -1 k(Boltzmann factor) ............................................................ 1.38x10 -23 J K -1 DATA Standard Heats of Formation and Standard Heats of Combustion with H 2 O( l ) as a product.(kJ mol -1 ) at 298K H o comb . H o f H(g) - 219.0 C(g) - 718.0 C(gr) -393.5 - H 2 O( l ) - -285.8 CH 4 (g) - -74.1 NH 3 (g) - 46.1 CH 2 =CH 2 (g) -1386.9 - Glycine(sol’n) -523.0 Glycylglycine(sol’n) -734.3 Bond Energies (kJ mol -1 ) E C-H 409 E C-C 344 Properties of water ( 29 H vap.
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