STUDY GUIDE - Final Exam (MOL S11)

STUDY GUIDE - Final Exam (MOL S11) - V55.0310 NATURAL...

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1 V55.0310 NATURAL SCIENCE II: THE MOLECULES OF LIFE SPRING 2011 STUDY GUIDE FOR FINAL EXAM These questions should be used to guide your studying for the midterm exam. The study questions are the same as the ones posted each week, but they have been re-organized to correspond to the textbook chapters This will help you to align your class notes and chapter readings. Some questions address foundational knowledge and concepts, with important scientific terms highlighted in bold . Other questions ( written in italics ) identify certain skills that you should develop throughout the course. This study guide contains questions on course content after Midterm 2 . For earlier material , please consult the study guides already posted for Midterm 1 and Midterm 2. CHAPTER 18: CHEMICAL REACTIONS AND CATALYSIS Nitrogen Fixation What is “nitrogen fixation? Why is it chemically difficult to convert N 2 gas into other nitrogen-containing molecules (e.g., NH 3 )? What industrial process is used to “fix” nitrogen from the atmosphere? What conditions are required? How are nitrogen-fixing bacteria able to achieve the same reaction at much milder conditions? Chemical Reactions Since burning carbon-containing molecules is energetically favorable, why doesn’t a charcoal grill spontaneously burst into flames? What is required to start the reaction? What analogy was used to talk about getting a chemical reaction started by overcoming a barrier?
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Draw an energy diagram to show how reactants are converted to products in a chemical reaction. Use the diagram to explain the following terms: reaction energy , activation energy , transition stat e. Use the example of a simple chemical reaction (CH 3 Br + OH - Æ CH 3 OH + Br - ) to illustrate the structural differences between the reactants, the products, and the transition state. Draw the chemical structures for each stage of the reaction. Catalysts What chemical demonstration was used in class to illustrate the action of a catalyst ? Describe what you observed during the demonstration and provide a chemical explanation of the demonstration. Draw a diagram to illustrate how a catalyst functions to influence a chemical reaction. Describe how a catalyst affects (a) the rate of the reaction, (b) the activation energy, and (c) the transition state. Write a summary statement to explain how catalysts work in terms of the
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STUDY GUIDE - Final Exam (MOL S11) - V55.0310 NATURAL...

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