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HW1 Key

# HW1 Key - Homework#1 Name 1 Complete the following...

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Homework #1 Name: ________________ 1. Complete the following statements for the reaction 2 N 2 O 5 (g) 4 NO 2 (g) + O 2 (g) a) The rate of formation of O 2 is _______ times the rate of consumption of N 2 O 5 . b) The rate of formation of NO 2 is _______ times the rate of decomposition of N 2 O 5. c) The rate of formation of NO 2 is _______ times the rate of formation of O 2 . 2. Circle the correct response: Reaction rates generally (increase/decrease/stay the same) throughout a reaction. The rate law (can/cannot) be determined directly from the balanced chemical equation. The reaction A + B C has a rate law of k[A]: Increasing the concentration of B will (increase/decrease/have no affect on) the rate of the reaction. Increasing the concentration of A will (increase/decrease/have no affect on) the rate of the reaction. True or False? Spontaneous reactions are always fast. (True/False)

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3. Consider the following reaction: 2NO (g) + O 2(g) 2NO 2(g) . Scientists study the kinetics of this reaction and run the following four experiments and determine the initial rates. Experiment # [NO] initial (mol/L) [O 2 ] initial (mol/L) Initial rate (mol L -1 s -1 ) 1 0.015 0.015 0.024 2 0.030 0.015 0.096 3 0.015 0.030 0.048 4 0.030 0.030 0.192 a) What is the rate law for the reaction?
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