1022JDBOptionalPartialLectureFinalExam(Chapters10-24,27-29)Spring2008MainAnswerKeyA

1022JDBOptionalPartialLectureFinalExam(Chapters10-24,27-29)Spring2008MainAnswerKeyA

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Dr. Jim Bloxton CHEM 1022 Second Summer Session 2006 OPTIONAL PRACTICE FINAL EXAM CHAPTERS 10-24 AND 27-29 ANSWER KEY Note: This is optional practice material for the Final Exam for chapters 10-24 & 27-29. These are sample questions that may or may not be used on a final exam. Other questions that are not found on this sample final exam will be on the actual final exam. Learn the basic principles and then be prepared to apply the principles to problems that you have not seen before. This includes all material that was covered or contained in the Chem 1022 lecture text, lecture notes, lecture handouts, study guides, recitation notes, and recitation handouts. It is very important to review all practice and actual lecture quizzes, midterms, study guides and homework materials. Several other practice final exams could have been generated from these materials that would look very different from this practice final exam. The number and distribution of questions from each chapter can also be different on the actual final exam. Note: It is very important to remember that Chemistry is a cumulative topic and that the material that was covered in previous chapters needs to be reviewed as this material will continue to reappear in concepts that are needed to solve new problems. Note corrected structure in reactant on problem 8. 1. Write a Lewis structure for CH 3 NH 2 and give the molecular geometry and predict the central bond angle about the N atom in CH 3 NH 2 . See 8 th edition of lecture text page 290 Table 10.2 for Lewis structure of methylamine. See 7 th edition of lecture text page 275 Table 10.2 for Lewis structure of methylamine. Trigonal pyrimidal 107.5 degrees 2. Write a condensed structures for two compounds that are isomers and are primary alcohols and have the formulas C 6 H 14 O. Many answers are possible: CH 3 CH 2 CH 2 CH 2 CH 2 CH 2 OH (CH 3 ) 2 CHCH 2 CH 2 CH 2 OH 3. What is the name of the following compound? CH 3 CHCH 3 CH 3 (CH 2 ) 4 CCH 2 CH 2 CH 2 CH 3 5-isopropyl-5-methyldecane CH 3 1
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4. Which compound has a higher boiling point and why: octane or 2,3,3-trimethylpentane? Octane and 2,3,3-trimethylpentane areboth hydrocarbons that are isomers that have the same molecular weight. However octane has the higher boiling point since it is not a branched hydrocarbon. The branching in 2,3,3-trimethylpentane lowers the that the London Dispersion forces and this decreases boiling point. 5. Write a balanced equation for the completion combustion of 4-ethylhexane. 2C 8 H 18 + 34O 2 16CO 2 + 18H 2 O 6. Write the IUPAC name for the following compound: CH 2 CH 3 CH 3 CH 2 CHC═CHCH 2 CH 2 CH 2 CH 2 CH 3 4-ethyl-4-methyl-4-decene CH 3 7. Draw the structure of cis-1,2-diethylcyclohexane.
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