105a_Spring 2008_Practice Exam 2

105a_Spring 2008_Practice Exam 2 - Chemistry 105 A Practice...

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1 Chemistry 105 A PLEASE PRINT YOUR NAME IN BLOCK LETTERS Practice Exam 2 Name: __________________________________ Last 4 Digits of USC ID:____ ____ ____ ____ Dr. Jessica Parr Lab TA’s Name: _________________________________ Lab: W 1 / W 4 / Th 9 / Th 1 / Th 4 Please circle lab section above. Question Points Score Grader 1 16 2 20 3 12 4 10 5 12 6 12 7 18 Total 100 Please Sign Below: I certify that I have observed all the rules of Academic Integrity while taking this examination. Signature: _______________________________________________________________ Instructions: 1. You must show work to receive credit. 2. If necessary, please continue your solutions on the back of the preceding page (facing you). 3. YOU MUST use black or blue ink. (No pencil, no whiteout, no erasable ink.) 4. There are 7 problems on 11 pages. Please count them before you begin. A periodic table and some useful equations can be found on the last page. 5. Good luck!! =) First Letter of last Name
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2 1. (16 pts) Circle the correct answer. i. What would happen to the average kinetic energy of the molecule of a gas sample if the temperature of the sample increased from 20 o C to 40 o C? a. It would double b. It would increase c. It would decrease d. It would become half its value e. None of the above ii. Circle the TWO acids which contribute the most to acid rain. a. HNO 3 b. H 2 SO 3 c. H 2 SO 4 d. H 3 PO 4 e. HClO 4 iii. While a piston performs work of 210 L*atm on the surroundings, the cylinder in which it is placed expands from 10 to 25 L. Against what pressure was the piston working? a. 14 atm b. 21 atm c. 8.4 atm d. 6 atm e. 15 atm iv. Calculate the heat of formation of carbon monoxide based on the reaction below: 2CO (g) + C (s) C 3 O 2 (g) ΔH rxn = 127.3 kJ/mol
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105a_Spring 2008_Practice Exam 2 - Chemistry 105 A Practice...

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