424 Repon Sheet Rates of Chemical Reactions : Rate and Order of 1,0, DeceptionB. Effect of TemperatureBATH TEMPERATURE35'cYol of OhنامTime485Buret rending(n)1219416.6182010222414115 951473821582358:26 CMS40148Total volume of 0, collectedBarometric pressure 770-572mlmm HgVapor pressure of water at bath temperature (see Appendix L) 42.2SlopeCompared with the rate found for solution 1, there isUsing the ideal gas law, calculate the moles of O; collected(show calculations)times faster10Based on the moles of O, evolved, calculate the molar concentration of the original 3% 1,0, solution (shocalculations)

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Answered: 424 Repon Sheet Rates of Chemical…

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter20: Kinetics

Section: Chapter Questions

Problem 20.38E: List at least four experimentally determined parameters that you, an experimenter, can define when...

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The rate of photodecomposition of the herbicide piclo- ram in aqueous systems was determined by exposure to sunlight for a number of days. One such experiment produced the following results. (Data from R.T. Hedlun and C.R. Youngson, “The Rates of Photodecomposition of Picloram in Aqueous Systems," Fate of Organic Pesticides in tbe Aquatic Environment, Advances in Chemistry Series, #111, American Chemical Society (1972), 159—172.) Exposure Time, t (days) [Pidoram] (mol L_1) 0 4.14 X 10-6 7 3.70 X 10-6 14 3.31 X 10-6 21 2.94 X 10~6 28 2.61 X 10~6 35 2.30 X 10-6 42 2.05 X 10-6 49 1.82 X 10"6 56 1.65 X 10-6 Determine the order of reaction, the rate constant, and the half-life for the photodecomposition of picloram.
Pyrolysis involves heating compounds to break them into smaller molecules, and typically involves free-radical chain reactions. Pyrolysis of crude oil fractions is a common method of making smaller hydrocarbons from large-chain hydrocarbons. Pyrolysis of ethane, C2H6, forms ethylene and hydrogen gases C2H4 and H2 as the primary products. Suggest a mechanism for this pyrolysis reaction, labeling your reactions as initiation, propagation, and termination steps.
The following experimental data were obtained for the reaction of \'I14* and NOf in acidic solution. NH/(aq) + NO2-(aq) — N;(g) + 2 H,O(f) INH/I (mol L1) [NO21 (mol L-1, Rate = A[NJ/At (mol L-1 s’) 0.0092 0.098 3.33 X IO"7 0.0092 0.049 1.66 X 10‘7 0.0488 0.196 3.51 X 10"6 0.0249 0.196 1.80 X 10-6 Determine the rate law for this reaction and calculate the rate constant.
The color change accompanying the reaction of phenolphthalein with strong base is illustrated below. The change in concentration of the dye can be followed by spectrophotometry (Section 4.9), and some data collected by that approach are given below. The initial concentrations were [phenolphthalein] = 0.0050 mol/L and [OH] = 0.61 mol/L. (Data are taken from review materials for kinetics at chemed.chem.purdue.edu.) (For more details on this reaction see L Nicholson, Journal of Chemical Education, Vol. 66, p. 725, 1989.) (a) Plot the data above as [phenolphthalein] versus time, and determine the average rate from t = 0 to t = 15 seconds and from t = 100 seconds to t = 125 seconds. Does the rate change? If so, why? (b) Use a graphical method to determine the order of the reaction with respect to phenolphthalein. Write the rate law, and determine the rate constant. (c) What is the half-life for the reaction?
Assume that thermal decomposition of mercuric oxide, HgO, follows first-order kinetics. It can be followed by the production of oxygen gas as a product: 2HgO(s)2Hg(l)+O2(g) At a particular temperature, k=6.02104s1. If 1.00gram of HgO were present initially, how long would it take to produce a1.00mL of O2(g) at STP; b10.0mL of O2(g) at STP? STP = standard temperature and pressure for a gas.
Reaction Conc. Na2S203 Conc. HCI A Abs. A Time (s) Rate (A Abs./BA Time) 1.3686611 1.5360817 1.2267196 1.007568 |0.300349 |0.01870913 |0.02870913 1 0.10 M .30 М 1.358380874 2 0.10 M .15 M 5.114311671 3 0.050 M .30 M 65.56796601 4 0.025 M .30 M 0.9563164 11.3085840 3. What is the overall order of the reaction? Write the complete rate law for this reaction.
DETERMINATION OF A,H FOR THE REACTION OF Mg AND HCl Minimize D The results from one run are shown below. 40 00003333333t1&C66C0000000000333333113ttteeccc000000 y = -0.51215 x + 40.274 20 10 4 5 Time (min) Q3 Use the graph to determine Tinitial and Tfinal. You must then use these values to calculate the change in temperature for the reaction. Tinitial (°C) Tinal (°C) AT (°C) 1 2 Temperature (°C) 30
for the reaction x+y+z --> products, the following data were obtained. Reaction times are inversely proportional to reaction rates 1) x .220 y.100, z.224 reaction time 214s 2) x.440 y.102, z.224 reaction time 107s, 3) x.439, y.050, z.223 4)x.440, y.100, z.447 reaction time 54s Determine the rate law including reaction orders with respect to all reactants and show how you obtained the reaction orders
Reaction Conc. Na2S½O3 Conc. HCI A Abs. A Time (s) Rate (A Abs./ga Time) 1.007568 0.300349 0.01870913 0.02870913 1 0.10 M .30 М 1.3686611 1.358380874 0.10 M .15 M 1.5360817 5.114311671 3 0.050 M .30 M 1.2267196 65.56796601 4 0.025 M .30 M 0.9563164 11.3085840 4. Use experimental data and the rate law to calculate a rate constant for each reaction 1, 2, 3, 4. How do the rate constants compare? Should they be the same or different? Discuss in your conclusions. Report the average value of your calculations. Be sure to include units in your rate constant. The rate law of the reaction is shown below: Rate = [Na2S2O3]-2
I need hemp in calculation part #1 please
-der Part A The reactant .concontraton in A 2ero-order eton was 50010 Mater 120 s and 1.00x1o Mater 30S What ia the rata constant for this Mew Aval able Hint c) 4. undo ngu kytoard whorleus Hp Ma M/s Submit Part B What was the initial roactart concontration for the naction doscribod in Part A? Vlow Avallable Hintic) rga Text ka ytoard shorlcuts ep JAlo = Submit Part C The reactant concentration in a first-order naaction whs 9.70x 10 Mater 45.0s and 2.30x10 Mater 85.0 s. What is the rate constant for this rbaction? View Avallable Hint(c) urido Rio T kaytoard shorleub tialp Submit Part D The reactant concantration in a socond-order neacion was 0.490 Malter 245 s and 7.60x 10 Mater 730 s. What is the mte constant for this rooaction? > Vlew Avallable Hint(c) undo ngo Tu kyboard ahorlculs p Bubmit Retum lo Asakginmant Provida Feodback
2. Compare the value you calculated with the actual value (-601.8 kJ/mol). Show your determination of percent error. Use the standard equation for this: actual value - experimental value %error = x 100% |actual value| ragraph* and which the & 3 4 7 8

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