Practice Exam 4

Practice Exam 4 - Chemistry 105a Exam #4 11/29/07 Dr....

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Chemistry 105a PLEASE PRINT YOUR NAME IN BLOCK LETTERS Exam #4 Name: _____________________________________________ 11/29/07 USC ID No: _________________________________________ Dr. Jessica Parr Lab TA’s Name: _____________________________________ Lab: Tu 9 / Tu 1 / Tu 4 / W 1 / W 4 / F 1 Please circle lab section above Question Maximum Points Score Grader 1 14 2 10 3 16 4 20 5 12 6 10 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 your 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.) 4. There are 7 problems on 10 pages. Please count them before you begin. A periodic table is on the last page. 5. Good luck! =) 1 First letter of last name
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Question #1 (14 pts) (a) (10 pts) What do the letters VSEPR stand for? V S E P R (b) (4 pts) Four unidentified liquids, A, B, C, and D have the following vapor pressures at 25 o C, 25 torr, 900 torr, 200 torr and 400 torr respectively. Arrange the liquids in order of increasing boiling points. < < < 2
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Question #2 (10 pts) Consider the following phase diagram for sulfur, which has two solid phases. (a) How many triple points are there in the phase diagram? ________________________ (b) What is the most stable phase at 700 atm and 200 o C? ________________________ (c) What is the boiling point of sulfur at 1 atm? ________________________ (d)
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Practice Exam 4 - Chemistry 105a Exam #4 11/29/07 Dr....

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