(a) Consider the following (overall) chemical reactionkABThe experimentally determined rate law expression reads: rate = k[A]. At 30 °C, thevalue of k is 3 x 10-4 s¹. Let the initial concentration of A be [A]0 = 0.75 mol L-¹. Thereaction should proceed until only 2% of the initial amount of A is present in thereaction mixture.(i) How long will this take at 30°C?(ii) What value would the rate coefficient k have to be, in order for theconcentration of A to reach the 2% level in 1 hour?(iii) At what temperature will k reach the value you calculated in (ii) assumingthat the activation energy is 40 kJ mol¹?

To answer this question, we'll go through each part using the provided data and concepts of…

Answered: (a) Consider the following (overall)…

Chemistry for Engineering Students

3rd Edition

ISBN:9781285199023

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 11.52PAE

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Diethylhydrazine reacts with iodine according to the following equation: Â (C2H5)2(NH)2(l)+I2(aq)(C2H5)2N2+2HI(aq)The rate of the reaction is followed by monitoring the disappearance of the purple color due to iodine. The following data are obtained at a certain temperature. (a) What is the order of the reaction with respect to diethylhydrazine, iodine, and overall? (b) Write the rate expression of the reaction. (c) Calculate k for the reaction. (d) What must [(C2H5)2] be so that the rate of the reaction is 5.00104mol/Lh when [ I2 ]=0.500M?
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The reaction NO(g) + O,(g) — NO,(g) + 0(g) plays a role in the formation of nitrogen dioxide in automobile engines. Suppose that a series of experiments measured the rate of this reaction at 500 K and produced the following data; [NO] (mol L ’) [OJ (mol L 1) Rate = -A[NO]/Af (mol L_1 s-1) 0.002 0.005 8.0 X 10"'7 0.002 0.010 1.6 X 10-'6 0.006 0.005 2.4 X IO-'6 Derive a rate law for the reaction and determine the value of the rate constant.
Give at least two physical properties that might be used to determine the rate of a reaction.
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