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Chemistry 1A - Fall 2000 - Pines - Midterm 3

Chemistry 1A - Fall 2000 - Pines - Midterm 3 - Chemistry 1A...

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Chemistry 1A Fall 2000 __________________________________________________________________________________ Midterm Exam III, version B November 14, 2000 (Closed book, 90 minutes, 155 points) Name: ______________________ Section Number: ____________________ SID: _______________________ T.A. Name: ________________________ Exam information, extra directions, and useful hints to maximize your score: Write your name on all 8 pages. There are two parts to the exam: 1) multiple choice and 2) short answer problems. For the multiple choice problems, fill in the Scantron TM form AND circle the answer on your exam. Answer the questions you know how to do first, then work on the questions you skipped. Show all work on the short answer problems for which you want credit and do not forget to include units! ________________Unit Prefixes ________________ milli, m (x 10 -3 ) micro, ° (x 10 -6 ) nano, n (x 10 -9 ) kilo, k (x 10 3 ) mega, M (x10 6 ) giga, G (x 10 9 ) Some possibly useful information: ) (reactants H (products) H H o f o f o = ) (reactants S (products) S S o o o = G = H - T S C p ° (H 2 O, l)= 1 cal/K · g E = q + w S = k B lnW 1 Cal = 1000 cal (Do not write in the box below.) Page Points 2-4 / 48 5-6 / 60 7-8 / 47 Total / 155 Bond Average Bond Enthalpy (kJ/mol) C-H 413 C-C 348 C-O 360 O=O 497 O-H 463 H-H 436 Compound H f ° (kJ/mol) at 25 o C S ° (J/mol-K) at 25 o C CO (gas) -110.5 197.7 CO 2 (gas) -393.5 213.6 H 2 (gas) 0 130.6 H 2 O (liquid) -285.8 70.0 CH 3 OH -238.7 126.8 C 2 H 5 OH -277.7 160.7 CH 3 COOH -484.5 159.8
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Page 2 of 2 Name:_________________________________________ Part 1: Multiple Choice. (4 pts each, 48 pts total) Instructions: Bubble in the correct answer on your Scantron sheet AND circle the answer on your exam. Each question has one correct answer. 1.) The answer to question 1 is B . Bubble in B on your Scantron form. 2.) Which has K P CO 2 at equilibrium? A.) Na 2 CO 3 (solid) Na 2 O(solid) + CO 2 (gas) B.) CaCO 3 (solid) CaO(solid) + CO 2 (gas) C.) C(solid) + O 2 (gas) CO 2 (gas) D.) CO 2 (solid) CO 2 (gas) E.) 2 MgO(solid) + C(solid) 2 Mg(solid) + CO 2 (gas)
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