Exam 2 - Chemistry 201X Hour Exam 2 Name_KEY GRADING Page 1...

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Chemistry 201X: Hour Exam 2 October 13, 2006 Name: ______KEY__________________________ GRADING Page 1 18 points _________________ Page 2 21 points _________________ Page 3 18 points _________________ Page 4 12 points _________________ Page 5 15 points _________________ Page 6 16 points _________________ TOTAL 100 points _________________ Rules for the Exam: (1) Show all work for the problems (pages 3-6). No credit will be given, even if an answer is written, if no work is shown. (2) Work independently. (3) You may tear off the last page and use it for information and additional scrap paper. Regrading Policy: We make every effort to grade exams thoroughly and accurately. However, when you receive your graded exam and you feel that there are grading errors in your exam, then the following rules apply: (1) You may return the exam for regrading only by the end of the class period in which it is returned to you. Once you leave the classroom with your exam, we will no longer accept it. (2) Write your concern(s) legibly and thoroughly on the front page of the test booklet – indicate clearly what you want to be re-evaluated. (3) We reserve the right to re-evaluate the entire exam when submitted.
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1 Points: _______ PART I. (18 pts; ca. 7 min.) Short Answer Questions (Circle your choices or fill in blanks) (1) (2 pts) Circle the conditions of pressure and temperature at which N 2 gas will behave most like an ideal gas . (a) 50.0 atm, 1000.0 K (c) 1.00 atm, 1000.0 K (b) 1.00 atm, 100.0 K (d) 50.0 atm, 100.0 K (2) (6 pts) For each of the following pairs of compounds, circle the one that has the higher normal boiling point : NaCl or HCl H 2 S or H 2 O Cl 2 or Br 2 ( B o t h P o l a r ) (3) (2 pts) One indication of strong intermolecular forces in a liquid is ( high, low ) vapor pressure. (4) (2 pts) At the triple point of H 2 O ( p = 0.006 atm, T = 0.01ºC), how many phases of H 2 O coexist? (a) 1 phase (b) 2 phases (c) 3 phases (d) Insufficient information. (5) (2 pts) The vapor pressure of a liquid doubles when the temperature is raised from 360 K to 370 K. The heat of vaporization of the liquid is (a) 76.8 kJ/mol (b) +76.8 kJ/mol (c) cannot be determined from these data. (6) (2 pts) When ice at 2 ° C is put under increasing pressure, it will transform into liquid water.
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Exam 2 - Chemistry 201X Hour Exam 2 Name_KEY GRADING Page 1...

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