2. The following data were obtained for the gas-phase decomposition of dinitrogen pentaoxide + 4NO; (g) +0; (g) 2N;O, (- IN,O, (mol/L) Initial Rate (mol /L) 8.90 x 10 2.26 x 10 0.0750 0.190 0.275 3.26x 10 0.410 4.85x 10 Defining the rate as -A (N;O,J/A write the rate law and calculate the value of the rate constant

In a study of the decomposition of hydrogen iodide on a gold surface at 150 °C HI(g)% H,(g) + % »(9) the following data were obtained: HI], M seconds 0.274 0.137 6.85×10-2 3.43x10-2 521 782 912 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 0.274 M is s and when the starting concentration is 0.137 M is (2) The average rate of disappearance of HI from t= 0s to t= 521 s is| Ms!. (3) The average rate of disappearance of HI from t= 521 s to t= 782 s is| Ms! (4) Based on these data, the rate constant for this | | order reaction is Ms!.

Nitrosyl chloride, NOCL decomposes to NO and Cl Determine the reaction arder with respect to NOCI from the following data: 2NOCI 2NO + Clz NOCIJ (M) 0.10 0.20 0.30 Rate (mol Lh) 8.0 x10 10 3.2 x10 72x10 O frst onder O second onder O hird onder

For the gas phase decomposition of nitrogen dioxide at 383 °C2 NO2  -------> 2 NO + O2the following data have been obtained: [NO2], M 0.423 0.178 0.113 7.61x10-2 time, s 0  6.00 12.0 18.0 The average rate of disappearance of NO2 over the time period from t = 6.00 s to t = 12.0 s is ________ M s-1.