10å¹´final - NAME: Circle Section Number: 10 11 80 81 C...

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NAME: CHEMISTRY 444, SPRING, 2010(10S) Circle Section Number: 10 11 80 81 Final Exam, May 21, 2010 Answer each question in the space provided; use back of page if extra space is needed. Answer questions so the grader can READILY understand your work; only work on the exam sheet will be considered. Write answers, where appropriate, with reasonable numbers of significant figures. You may use only the "Student Handbook," a calculator, and a straight edge . 1. (15 points) A. Starting with the Maxwell distribution of speeds, F(v) dv = 4 π m 2 k B T 3/2 exp m ( v 2 ) 2 k B T v 2 dv derive the expression for the average speed given as: B. Consider Xenon gas at 298K and Pressure = 1 atmosphere. What is the mean free path based on the Lennard-Jones diameter for a Xenon molecule? DO NOT WRITE IN THIS SPACE p. 1________/15 p. 2________/10 p. 3________/10 p. 4________/10 p. 5________/10 p. 6________/10 p. 7________/15 p. 8________/10 p. 9________/10 p. 10_______/10 p. 11_______/15 p. 12_______/10 ============= p. 13 ______/10 (Extra credit) ============= TOTAL PTS /135
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Score for Page NAME: CHEM 444, Final, Spring, 2010, page 2 2. (10 Points) Multiple Choice. Select the best answer to the question. 1. The mean free path as determined in the context of kinetic theory a. depends linearly on temperature b. depends inversely on pressure c. is the average distance a gas particle travels between successive collisions d. all of the above Answer: ___d__ 2. Kinetic theory predicts the energy of a gas to depend on a. pressure b. viscosity c. temperature d. incident frequency Answer: _c____ 3. Perturbation-Relaxation methods such as temperature jump (T-jump) experiments are designed to probe a. chemical kinetics for equilibrium processes where initial conditions cannot be controlled b. fast reactions c. rate constants d. all of the above Answer ___d___ 4. Transition state theory invokes the concept(s) of a. commutators b. a maximum in the free energy profile along the reaction coordinate connecting reactant(s) and product(s) c. equipartition d. slow reaction kinetics Answer: __b_____ 5. In heterogeneous catalysis, the variation of surface coverage of a solid catalyst at a given temperature with changing pressure is called a(n) a. phase diagram b. T-x-y diagram c. adsorption isotherm d. turnover Answer:___c___
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Score for Page NAME: CHEM 444, Final, Spring, 2010, page 3 3. (10 Points) Consider the following reaction mechanism for a unimolecular reaction: where A* is an energetic intermediate. What is the expression for the rate of production of B. Make any appropriate assumptions for this problem.
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This note was uploaded on 05/10/2011 for the course CHEM 444 taught by Professor Dybowski,c during the Spring '08 term at University of Delaware.

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10å¹´final - NAME: Circle Section Number: 10 11 80 81 C...

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