Exam 4 2006 - DR. JOSEPH BURNETT FALL 2006 THIS EXAM...

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Unformatted text preview: DR. JOSEPH BURNETT FALL 2006 THIS EXAM CONSISTS OF 18 QUESTIONS ON 9 PAGES CHEM 155 HOUR EXAM IV NOVEMBER 29, 2006 NAME______________________ RECIT. INSTR.______________ RECIT. SECT._______________ GRADING Teaching Assistants and Recitation Sections PAGE POINTS SCORE Name Sections Time 2 3 4 5 6 7 8 TOTAL 14 pts 22 pts 22 pts 15 pts 10 pts 17 pts 2 pts 102 pts ________ ________ ________ ________ ________ ________ ________ Gulden Camci Unal Deepak Dibya Kristopher McKee Alex Reynolds Qin Zhao 1, 5, 10, 16 6, 7, 9, 15 2, 11, 12, 14 13 3, 4, 8, 17 8:00, 12:10, 11:00, 10:00 12:10, 1:10, 10:00, 3:10 9:00, 12:10, 1:10, 2:10 2:10 10:00, 11:00, 9:00, 3:10 QUESTIONS ARE WRITTEN ON BOTH SIDES OF EACH PAGE. THERE IS A PERIODIC TABLE ON THE LAST PAGE. YOU MAY REMOVE THIS PAGE FOR SCRATCH PAPER. THE ANSWER KEY TO THIS EXAM WILL BE POSTED ON THE CHEM 155 WEBSITE. SHOW ALL WORK. ANSWERS SHOULD INCLUDE APPROPRIATE UNITS AND CONTAIN THE CORRECT NUMBER OF SIGNIFICANT FIGURES. CHEM 155 FINAL EXAM TUESDAY, DECEMBER 12 4:30-6:30 P.M. SAME ROOMS AS HOUR EXAMS NO CHANGE 2 1. Use the following reaction equation and information to answer parts i and ii. 3 Fe (s) + 4 CO 2 (g) Fe 3 O 4 (s) + 4 CO (g) H = +12.5 kJ i. (2 pts) The reaction is ____________ . A. exothermic B. endothermic C, not enough information to determine. ii. (4 pts) What is the amount of heat in kJ that is transferred by the reaction if 1.98 moles of CO is produced? For full credit, show all work, use units, and report your answer with the correct number of significant figures. 2. (8 pts) Given the following reactions N 2 (g) + O 2 (g) 2 NO (g) H = +180.7 kJ 2 NO (g) + O 2 (g) 2 NO 2 (g) H = 113.1 kJ calculate the enthalpy of reaction, H rxn , in kJ for: 4 NO (g) 2 NO 2 (g) + N 2 (g) H = kJ For credit, show all work, include units. A. +67.6 B. +45.5 C. 293.8 D. 45.5 E. +293.8 F. None of the above 2 1. Use the following reaction equation and information to answer parts i and ii. 3 Fe (s) + 4 CO 2 (g) Fe 3 O 4 (s) + 4 CO (g) H = +12.5 kJ i. (2 pts) The reaction is ____________ . A. exothermic B. endothermic C, not enough information to determine. ii. (4 pts) What is the amount of heat in kJ that is transferred by the reaction if 1.98 moles of CO is produced? For full credit, show all work, use units, and report your answer with the correct number of significant figures....
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Exam 4 2006 - DR. JOSEPH BURNETT FALL 2006 THIS EXAM...

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