Midterm 2 Problems - 2007-1

Midterm 2 Problems - 2007-1 - UC Berkeley, Chem C130/MCB...

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Unformatted text preview: UC Berkeley, Chem C130/MCB 100A, Fall 2007, Mid-term Exam 2. Your Name___________________________ Page 1 of 12 UNIVERSITY OF CALIFORNIA, BERKELEY CHEM C130/MCB C100A MIDTERM EXAMINATION #2. October 18, 2007 INSTRUCTORS: John Kuriyan and Bryan Krantz THE TIME LIMIT FOR THIS EXAMINATION IS 1 HOUR AND 20 MINUTES SIGNATURE: ________________________________________________________________ Please SIGN your name ( in indelible ink ) on the line above. YOUR NAME: ________________________________________________________________ Please PRINT your name ( in indelible ink ) on the line above (& on the top right hand corner of every page). Also, please write all of your answers as legibly as possible . PLEASE CIRCLE THE NAME OF THE GSI FROM WHOM YOU WILL PICK UP YOUR GRADED MID-TERM EXAM: Rachel Bernstein Padma Gunda Katie Thoren James Fraser This exam consists of 5 questions, each worth 20 points total, as indicated below, for a total of 100 points. Question Part A Part B Part C Part D Your Total Maximum Score 1. (7) (7) (6) --------------- 20 2. (12) (8) -------------- --------------- 20 3. (10) (10) -------------- -------------- 20 4. (14) (6) ------------- ------------- 20 5 20 TOTAL ---------- ---------- ---------- ----------- 100 UC Berkeley, Chem C130/MCB 100A, Fall 2007, Mid-term Exam 2. Your Name___________________________ Page 2 of 12 Question 1 20 points total. (A) (7 points) Consider the two systems shown below, labeled A and B. Each consists of identical molecules, indicated by black circles. Each system is divided into 16 equal-sized gridboxes. A: B: (i) (2 points) Which has higher entropy, A or B? (ii) (5 points) What is the difference in entropy between in A and B (assume that k B = 1 to simplify calculations). Provide the details of how you work out the answer. UC Berkeley, Chem C130/MCB 100A, Fall 2007, Mid-term Exam 2. Your Name___________________________ Page 3 of 12 Question 1, continued. (B) (7 points). The state C of a System consists of six molecule, indicated by black circles. Three of these molecules undergo a conformational change, and the new state of the system is shown on the right. There is no change in energy. C: D: Will State C convert spontaneously to State D? Explain your answer fully....
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Midterm 2 Problems - 2007-1 - UC Berkeley, Chem C130/MCB...

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