138 Experiment 3 Kinetic Study: The lodine Clock Reaction 2. The reaction H2 (g) + 2 NO (g) → N2O (g) + H2O (g) is studied at a certain tempera- ture by determining the rate of reaction at reactant concentrations. The results are as follows. Concentration (M) Rate [NO] [H]] (M/s) (i) 0.25 0.10 0.126 (ii) 0.50 0.10 0.504 (iii) 0.50 0.20 1.03 The rate law is written as Rate k [NO]* [H2]. The exponents x and y represent the order with respect to NO and H2, respectively. Calculate the value of x and y from the data provided. 3. The decomposition of N,O5 in carbon tetrachloride has been studied: 2 N2O5 (g) → 2 N,O4 (g) + O2 (g) The concentration of N,O5 is measured every 400 seconds. The data are tabulated below. [N,O5] (M) time Δt A[N,Os] (M) Rate = -A[N,O;]/At (M/s) %3D (s) (s) 0.0 1.40 400.0 1.10 800.0 0.87 1200.0 0.68 a) Fill the blanks in the table. Note that the last column is the average rate of reaction. b) Briefly explain why the rates are decreasing.

138 Experiment 3 Kinetic Study: The lodine Clock Reaction 2. The reaction H2 (g) + 2 NO (g) → N2O (g) + H2O (g) is studied at a certain tempera- ture by determining the rate of reaction at reactant concentrations. The results are as follows. Concentration (M) Rate [NO] [H]] (M/s) (i) 0.25 0.10 0.126 (ii) 0.50 0.10 0.504 (iii) 0.50 0.20 1.03 The rate law is written as Rate k [NO]* [H2]. The exponents x and y represent the order with respect to NO and H2, respectively. Calculate the value of x and y from the data provided. 3. The decomposition of N,O5 in carbon tetrachloride has been studied: 2 N2O5 (g) → 2 N,O4 (g) + O2 (g) The concentration of N,O5 is measured every 400 seconds. The data are tabulated below. [N,O5] (M) time Δt A[N,Os] (M) Rate = -A[N,O;]/At (M/s) %3D (s) (s) 0.0 1.40 400.0 1.10 800.0 0.87 1200.0 0.68 a) Fill the blanks in the table. Note that the last column is the average rate of reaction. b) Briefly explain why the rates are decreasing.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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