Chemistry 111 Page 1 out of 7 Exam III /Fall 2003 Answer KeyInstructions. Failure to show work will result in zero points being awarded in any question, unless it actually requires no work. If a blank is provided for an answer, you must enter your answer in that blank. 1. If the reaction: A →Products… follows second order kinetics, then a plot of [A] versus time would be linear. True or false? Circle your answer. (02 pts)2. Going back to the first question, a plot of ln[A] versus time would be linear. True or false? Circle your answer. (03 pts)3. If the time is measured in minutes, what would be the units of k in the first question? Write your answer in the blank. (03 pts)L mol-1min-1or atm-1min-14. Which of the following would have the largest value for bin the Vander Waals equation of state? (03 pts)CH3CH2CH3CH3C(CH3)2CH3CH3CH3CH4For questions 5-8, consider three identical tanks kept under the exact conditions of temperature and pressure. One contains SO2(MW = 64), another contains O2(MW = 32) and the last one has CH4(MW = 16). 5. Which of these gases would have the highest average kinetic energy? (03 pts)They are all at the same temperature, therefore they all have the sameaverage kinetic energy. Remember that the average kinetic energy is given by… KE=32R T6. Which of these gases would have the fastest root mean square velocity? (03 pts)Now that is a different question. They have the same energy, but since they have different molecular weights, they have different average velocities. From the equation… vrms=3 R TMW
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