Practice MT1 Sp 08

Practice MT1 Sp 08 - General Chemistry CHM U 214 D Spring...

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General Chemistry CHM U 214 D Your Name____ KEY _________ Spring 2008 e-mail________________________ Practice Mid-Term Exam I DIRECTIONS This exam consists of four pages and 25 (see Note) multiple answer questions. Also included are a periodic table and blank space for your use. Mark the letter (a, b, c or d) of each best answer on the scantron, which determines your grade. Also write your answer on the test for your records and keep it to prepare for the Final Exam. _c_1. The enthalpies of vaporization of the liquids diethyl ether, water and mercury are 26.0, 40.7 and 59.3 kJ/mol, respectively. Which liquid has the strongest intermolecular forces? a. diethyl ether b. water c. mercury d. don’t know _c_2. Which of these statements is not true? a. The vapor pressure of a liquid increases with increasing temperature b. The boiling point of a liquid increases with increasing pressure of the surroundings c. Doubling the quantity of liquid doubles its vapor pressure at fixed temperature d. Vapor pressure is an intensive property of a liquid _b_3. The surface tension and viscosity of a liquid a. increase with increasing temperature b. decrease with increasing temperature c. increase with increasing pressure d. decrease with increasing pressure _d_4. The unusually high viscosity, surface tension, freezing point and boiling point of water are due to a. its large molecules b. its position in the periodic table c. its shape d. hydrogen bonding _b_5. The vapor pressure of pure water is 149 torr at 60 o C. The vapor pressure of water above a solution containing 4.5 mole of water and 0.5 mole of non-volatile glucose, C 6 H 12 O 6 , is 126 torr at 60 o C. Is the solution obeying Raoult’s Law?
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