Midterm1-2006 - Professor J.C. Scaiano Department of Chemis...

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Professor J.C. Scaiano Department of Chemistry Tel.: 613-562-5896 University of Ottawa Fax: 613-562-5633 Ottawa, Canada K1N 6N5 E-mail: tito@photo.chem.uottawa.ca Please print CHM3125 Family name: MIDTERM 1 (25%) First name: 8-Feb-2006 Student #: Time allowed: 70 minutes Question 1 2 3 4 5 6 7 Total Value 20 10 5 5 5 5 5 50 Mark Notes IMPORTANT : You must answer questions # 1 and # 2. then, Answer 4 questions only from questions 3 to 7. Please indicate below which question you do NOT want marked. If you make no selection, question number 7 will not be marked. Please do NOT mark question number:
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th 2005 page 2 of 11 1. (20 MARKS – stars show marks ) Short Answer – no half marks. a) **The CH 3 radical is planar. That means the carbon has a(an) _______________ hybridization and that the free electron is in a(an) _______________ orbital. b) *For the hypothetical reaction A + B C + D, the activation energy is 23 kcal/mol. For the reverse reaction, the activation energy is 16 kcal/mol. What is the enthalpy change for the forward reaction ( H reaction )? _____________________ c) *All other variables being equal, which has a bigger flame? HYDROGEN METHANE d) *If you plot the inverse of concentration (1/c) in function of time for a given chemical reaction and obtain a straight line, the reaction occurs through a FIRST ORDER UNIMOLECULAR SECOND ORDER process. e) *The first synthetic organic compound of industrial and commercial success was MAUVEINE TRINITROTOLUENE SULFURIC ACID VIOXX f) **Push the electrons for the following reaction of the ethyl radical. What is the specific name given to this type of termination reaction? ______________________ H
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Midterm1-2006 - Professor J.C. Scaiano Department of Chemis...

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