chem_126_common_1_2010_x905a

chem_126_common_1_2010_x905a - Feb. 26, 2010 Chemistry 126...

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Feb. 26, 2010 Chemistry 126 Common 1 1) Questions 1-2. The natural log of the reactant concentration is plotted versus time and produces a straight line. What is the order of the reaction? A. 0 B. ½ C. 1 D. 2 E. 3 2) What is the numerical value of the rate constant? A. 0.0050 B. 0.010 C. 0.015 D. 0.020 E. >1 3-4) The table gives the experimental data for the reaction: A(g) + 2B(g) C(g) at 850 K. 3) What is the order of the reaction with respect to A? A. 0 B. ½ C. 1 D. 2 E. 3 4) What is the overall order of the reaction? (You first need to find the order with respect to B.) A. 0 B. 1 C. 2 D. 3 E. 4 5) The table gives the experimental data for the reaction: A(g) 2B(g) at 1050 K. What is the rate constant in M/hr ? A. 0.050 M/hr B. 3.3 M/hr C. 10. M/hr D. 20. M/hr E. 0.30 M/hr Run [A] (M) [B] (M) Rate (M/s) 1 0.05 0.33 2.10 x 10 -3 2 0.10 0.33 8.40 x 10 -3 3 0.15 0.66 3.78 x 10 -2 Run [A] (M) Rate (M/sec) 1 0.15 0.0055 2 0.40 0.0055 3 0.90 0.0055
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6) The reaction for the decomposition of A is: 2A(g) 3B(g) + C(g). At a certain temperature, the concentration of A is 0.040 M. 95 s later its concentration is 0.025 M. What is the average rate of change of B for this time interval? A. -7.9x10 -5 M/s B. 7.9x10 -5 M/s C. 1.6x10-4 M/s D. 4.8x10 -4 M/s E. 2.4x10 -4 M/s 7) Under certain conditions when excess solid phosphorus reacts with chlorine gas, phosphorus trichloride gas is the principle product. It is easy to monitor the total pressure. However, the chlorine pressure is needed to measure the rate. The initial chlorine pressure is 800 torr. What is the chlorine pressure when the total pressure is 650 torr? A.
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This note was uploaded on 03/30/2012 for the course CHEM 126 taught by Professor Biolsi during the Spring '08 term at NJIT.

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chem_126_common_1_2010_x905a - Feb. 26, 2010 Chemistry 126...

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