HW08 - Chemistry 111 Homework #8 Due: November 2, 2005...

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Homework #8 Due: November 2, 2005 (Wednesday) For questions 1-6 answer true or false as appropriate. 1. The units of the rate constant can be established if we know the order of the reaction and the way the rate was measured (whether it was M/min, or M/s, or, atm/min, or…). 2. The units of the actual rate for the reaction are totally independent of the order for the reaction. 3. Consider the following first order reaction 2 A Æ B + C. The rate of the reaction increases as more B and C are formed. 4. In the reaction in question 3 , the time required for one-half of substance A to react is dependent on the quantity of A present initially. 5. In the reaction in question 3, a plot of the inverse of the [A] versus time is linear. 6. The units of the rate constant could be inverse minutes (min -1 ) for a the reaction in question 3 . 7. A certain second order reaction has a rate constant of 0.0321 M -1 min -1 at 27°C. At 57°C, the rate constant is measured to be 0.525 M -1 min -1 . Determine the activation energy of this reaction. a) 15.3 kJ/mol b) 1.19 kJ/mol c) 33.3 kJ/mol d) 757 J/mol e) 76.7 kJ/mol f) None of these. 8. A certain chemical reaction has an activation energy of 87.6 kJ/mol. At what temperature will the rate of this reaction be quadrupled, relative to 27°C? a)
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HW08 - Chemistry 111 Homework #8 Due: November 2, 2005...

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