Sample Exam III - Department of Chemistry CHM 1220/1225...

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Department of Chemistry CHM 1220/1225 Exam III – Sample Exam 1. Carbon disulfide, CS 2 , is a volatile, flammable liquid. It has a vapor pressure of 400.0 mmHg at 28.0ºC. Its normal boiling point is 46.5ºC. What is its heat of vaporization, Δ vap (in kJ/mol)? 2. Consider the three molecules: H 2 S, F 2 , and CH 3 OH. a. Identify the intermolecular forces present for each: Compound Intermolecular Forces H 2 S F 2 CH 3 OH b. Arrange the molecules from weakest to strongest intermolecular forces. c. Which has the highest vapor pressure? d. Which has the highest boiling point? e. Which has the highest heat of vaporization? 3. Complete the following table for types of solids: SOLID TYPE S TRUCTURAL UNIT ATTRACTIVE FORCE BETWEEN STRUCTURAL UNITS EXAMPLE 4. Refer to the Information Page. a. The top phase diagram is labeled with several points. Identify the following: A B l i n e P o i n t A P o i n t C A D l i n e A C l i n e b. Now compare the top phase diagram to the second phase diagram. One represents water. Which one is it? Give three reasons why this is your choice. c.
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This note was uploaded on 02/02/2010 for the course CHM 1220 taught by Professor Barber during the Spring '07 term at Wayne State University.

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Sample Exam III - Department of Chemistry CHM 1220/1225...

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