Chem 2 Exam 1 - View Attempt...

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View Attempt 1 of 1 Title: Exam 1 Started: September 28, 2009 4:00 PM Submitted: September 28, 2009 4:52 PM Time spent: 00:52:14 Total score: 15/20 = 75% Total score adjusted by 0.0 Maximum possible score: 20 1. Which type of intermolecular force ("interparticle force") is the most important in CCl 4 (l)? Student Response Correct Answer 1. London Dispersion 2. Dipole-dipole forces 3. Ion-dipole forces 4. Hydrogen bonds 5. Ionic bonds Score: 0/1 2. Which of the following substances would be expected to have the lowest vapor pressure? Student Response Correct Answer 1. methane 2. CF 4 3. CCl 4 4. CBr 4 5. CI 4 Score: 1/1 3. How much energy in J is needed to convert 13 g of solid ethanol at -150 o C to liquid at -109 o C. You might need to know that: mp = -114 o C and bp = 78 o C The heat of fusion is 4.6 kJ/mol and the heat of vaporization is 46.0 kJ/mol. Finally, the specific heats of the solid, liquid and gas are, respectively 2.1, 3.2 and 1.8 J/g o C. View Attempt https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent. .. 1 of 7 11-Oct-09 2:19 AM
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Student Response Correct Answer 1. 2490 2. 1190 3. 61000 4. 14190 5. 2915 Score: 1/1 4. Which of the following is not indicative of the existence of weak intermolecular forces of attraction in a liquid? Student Response Correct Answer a. a very low boiling point b. a very low vapor pressure c. a very low viscosity d. a very low heat of vaporization e. a very low freezing point Score: 0/1 5. Which of the following statements is true? Student Response Correct Answer a. Ideal colligative properties do not depend on the nature of the solute particles in a given solution.
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This note was uploaded on 01/28/2011 for the course CHEM 1332 taught by Professor Shiv during the Spring '08 term at University of Houston.

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Chem 2 Exam 1 - View Attempt...

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