Problem Set 4 - Chem 208 Spring 2008 Problem Set 4 Due Fri...

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Chem 208, Spring 2008 Problem Set 4 Due Fri. Feb. 22 at 2:00PM Name: ___________________ Lab TA Name: ____________________ Lab Day: _______________ Suggested Additional Problems: Chapter 14- 37, 43, 55, 57, 86, 90 1. It takes longer to cook foods at high altitude because water boils at a lower temperature. For example, at 8000 ft. elevation, water boils at 92 o C. The major reaction when eggs are boiled is the unfolding of the protein, which has an activation energy of about 45 kJ/mol. If a “3-minute egg” refers to the consistency of an egg obtained by boiling an egg for 3.00 minutes at sea level, how long would it take to make a “3-minute egg” at 8000 ft? This is not a trick question; the correct answer is not “3 minutes”. 2. Consider the following two-step reaction mechanism: ) g ( NOCl ) g ( Cl ) g ( NO 2 1 k 1 k 2 + ) g ( NOCl 2 ) g ( NO ) g ( NOCl 2 k 2 ⎯→ + a) What is the overall reaction? b) It was found that the reaction is first order in Cl 2 and second order in NO. Under what conditions is this consistent with the above mechanism?
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