5.The reaction A →→ B + C is known to be first order in A. Below are data showing the concentration of Aas a function of reaction time.Time, h012481012[A]. M1.50 x 10-¹1.27 x 10-11.07 x 10-17.66 x 10-²3.91 x 10-²2.80 x 10-22.00 x 10-2(a) What is the average rate of reaction between 1 and 4 h? Report the units as well as the numbers.(b) Plot the data above, showing the concentration of A as a function of the time. From your graph,determine the instantaneous rate of reaction at 8 h. Report the units as well as the numbers.(c) Plot In [A] versus time. Estimate the rate constant for this first-order reaction from your graph.Report the units as well as the numbers.

The given first order reaction is :A → B + CThe data showing change in concentration of A with…

12 2.00 x 10-2 (a) What is the average rate of reaction between 1 and 4 h? Report the units as well as the (b) Plot the data above, showing the concentration of A as a function of the time. From you ne the instantaneous rate of reaction at 8 h. Report the units as well as the numbers. (c) Plot In [A] versus time Estimate the rate constant for this first-order reaction from your

12 2.00 x 10-2 (a) What is the average rate of reaction between 1 and 4 h? Report the units as well as the (b) Plot the data above, showing the concentration of A as a function of the time. From you ne the instantaneous rate of reaction at 8 h. Report the units as well as the numbers. (c) Plot In [A] versus time Estimate the rate constant for this first-order reaction from your

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter12: Chemical Kinetics

Section: Chapter Questions

Problem 110CP: Consider the following hypothetical data collected in two studies of the reaction 2A+2BC+2D Time(s)...

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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.
Consider the following statements: In general, the rate of a chemical reaction increases a bit at first because it takes a while for the reaction to get warmed up. After that, however, the rate of the reaction decreases because its rate is dependent on the concentrations of the reactants, and these are decreasing. Indicate everything that is correct in these statements, and indicate everything that is incorrect. Correct the incorrect statements and explain.
11.32 The following experimental data were obtained for the reaction 2A + 3 B—C + 2D [A](mol L 1) [B](mol L ’) Rate = A(C]/Af (mol L-1 s-1) 0.127 0.15 0.033 0.127 0.30 0.132 0.255 0.15 0.066 Determine the reaction order for each reactant and the value of the rate constant.
. Account for the increase in reaction rate brought about by a catalyst.
Why awe elementary reactions involving three or more reactants very uncommon?
The reaction 2 NO(g) + 2 H2(g) N2(g) + 2 H2O(g) was studied at 904 C, and the data in the table were collected. (a) Determine the order of the reaction for each reactant. (b) Write the rate equation for the reaction. (c) Calculate the rate constant for the reaction. (d) Find the rate of appearance of N2 at the instant when [NO] = 0.350 mol/L and [H] = 0.205 mol/L.
Give at least two physical properties that might be used to determine the rate of a reaction.
11.35 For the reaction 2 NO(g) + 2 H?(g) — N,(g) + 2 H,O(g) at 1100°C, the following data have been obtained: [NOJ [HJ Rate = A(N2]/At (mol L~1) (mol L_1) (mol L-1 s_1) 5.0 X 10’1 0.32 0.012 1.0 X 10~’ 0.32 0.048 1.0 X 10"2 0.64 0.096 Derive a rate law for the reaction and determine the value of the rate constant.
Hydrogen iodide, HI, decomposes in the gas phase to produce hydrogen, H2, and iodine, I2. The value of the rate constant, k, fur the reaction was measured at several different temperatures and the data are shown here: Temperature (K) k (M -1 5-1) 555 6.23107 575 2.42106 645 1.44104 700 2.01103 What is the value of the activation energy (in kJ/mol) for this reaction?
Consider the following hypothetical data collected in two studies of the reaction 2A+2BC+2D Time(s) Experiment 1 [A] (mol/L) Experiment 2 [A] (mol/L) 0 1.0 102 1.0 102 10. 8.4 103 5.0 103 20. 7.1 103 2.5 103 30. ? 1.3 103 40. 5.0 103 6.3 104 In Experiment 1, [B]0 = 10.0 M. In Experiment 2, [B]0 = 20.0 M. Rate=[A]t a. Use the concentration versus time data to determine the rate law for the reaction. b. Solve for the value of the rate constant (k) for the reaction. Include units. c. Calculate the concentration of A in Experiment 1 at t =30.s
For the reaction of crystal violet with NaOH(aq), the measured rate of reaction is 1.27 106 mol L1 s1 when the concentration of crystal violet cation is 4.13 105 mol/L. (a) Estimate how long it will take for the concentration of crystal violet to drop from 4.30 105 mol/L to 3.96 105 mol/L. (b) Could you use the same method to make an accurate estimate of how long it would take for the concentration of crystal violet to drop from 4.30 105 mol/L to 0.43 105 mol/L? Explain why or why not.