ain Suisea28. Hydrogen peroxide commonly known as agua oxigenada, decomposes into waterand oxygen gas. Adding Magnesium oxide catalyzes this reaction. Two set-ups ofthe decomposition of the same amounts of Hydrogen are observed. The firstset-up finishes after 10 minutes while the second set up finishes after 5 minutes.Which of the two set-ups is catalyzed?A. Set-up 1B. Set-up 2C. Set-up 1 and 2D. This problem lack important details.29. Refer to the figure below. In which set-up will the reaction occur faster?SH up XSet up OC. They have the same speed.A. Set-up QB. Set-up XD. The reactions cannot be determined.30. Which pertains to the minimum amount of energy required to initiate a chemicalreaction?C. Chemical ReactionA. Activation rateB. Activation energyD. Concentration31. Which of the following statements about rates of reaction is TRUE?A. A sugar cube will dissolve faster in water than a powdered sugar.B. Coffee powder will dissolve faster in hot water than in cold water.C. Painting iron fences decreases the surface area exposed to the air, thus delaysrusting.D. One gram of powdered juice dissolved in 100 ml of water will have a moreintense taste than a 5 gram of powdered juice dissolved in the same amountof water.2022.04.01 21:49

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28. Hydrogen peroxide commonly known as agua oxigenada, decomposes into water and oxygen gas. Adding Magnesium oxide catalyzes this reaction. Two set-ups of the decomposition of the same amounts of Hydrogen are observed. The first set-up finishes after 10 minutes while the second set up finishes after 5 minutes. Which of the two set-ups is catalyzed? A. Set-up 1 B. Set-up 2 C. Set-up 1 and 2 D. This problem lack important details.

28. Hydrogen peroxide commonly known as agua oxigenada, decomposes into water and oxygen gas. Adding Magnesium oxide catalyzes this reaction. Two set-ups of the decomposition of the same amounts of Hydrogen are observed. The first set-up finishes after 10 minutes while the second set up finishes after 5 minutes. Which of the two set-ups is catalyzed? A. Set-up 1 B. Set-up 2 C. Set-up 1 and 2 D. This problem lack important details.

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 11.52PAE: Hydrogen peroxide (H20i) decomposes into water and oxygen: H,O2(aq) — H,O(f) + ^O2(g) Ordinarily...

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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 peroxide (H20i) decomposes into water and oxygen: H,O2(aq) — H,O(f) + ^O2(g) Ordinarily this reaction proceeds rather slowly, hut in the presence of some iodide ions (I-), the decomposition is much faster. Ihe decomposition in the presence of iodide was studied at 20°C, and the data were plotted in various ways. Use the graphs below to answer the questions that follow. What is the order of reaction for the decomposition of hydrogen peroxide? Find the numerical value of the rate constant at 20°C, including the correct units. Obtain an estimate of the initial rate of reaction in the experiment that produced the graphs (i.e., the rate at t = 0 in the graphs).
One mechanism for the destruction of ozone in the upper atmosphere is a. Which species is a catalyst? b. Which species is an intermediate? c. Ea for the uncatalyzed reaction O3(g)+O(g)2O2(g) is 14.0 kJ. Ea. for the same reaction when catalyzed is 11.9 kJ. What is the ratio of the rate constant for the catalyzed reaction to that for the uncatalyzed reaction at 25C? Assume that the frequency factor A is the same for each reaction.
Can a reaction mechanism ever be proven correct? Can it be proven incorrect?
In Chapter 3, we discussed the conversion of biomass into biofuels. One important area of research associated with biofuels is the identification and development of suitable catalysts to increase the rate at which fuels can be produced. Do a web search to find an article describing biofuel catalysts. Then, write one or two sentences describing the reactions being catalyzed, and identify the catalyst as homogeneous or heterogeneous.
At 40C, H2O2 (aq) will decompose according to the following reaction: 2H2O2(aq)2H2O(l)+O2(g) The following data were collected for the concentration of H2O2 at various times. Times(s) [H2O2](mol/L) 0 1.000 2.16 104 0.500 4.32 104 0.250 a. Calculate the average rate of decomposition of H2O2 between 0 and 2.16 104 s. Use this rate to calculate the average rate of production of O2(g) over the same time period. b. What are these rates for the time period 2.16 104 s to 4.32 104 s?
Nitrogen dioxide reacts with carbon monoxide by the overall equation NO2(g)+CO(g)NO(g)+CO2(g) At a particular temperature, the reaction is second order in NO2 and zero order in CO. The rate constant is 0.515 L/(mol s). How much heat energy evolves per second initially from 3.50 L of reaction mixture containing 0.0275 M NO2? See Appendix C for data. Assume the enthalpy change is constant with temperature.
The thermal decomposition of diacetylene, C4H2, was studied at 950 C. Use the following data (K. C. Hou and H. B. Palmer, Journal of Physical Chemistry. Vol. 60, p. 858, 1965) to determine the order of the reaction.
The following statements relate to the reaction for the formation of HI: H2(g) + I2(g) -* 2 HI(g) Rate = it[HJ [I2J Determine which of the following statements are true. If a statement is false, indicate why it is incorrect. The reaction must occur in a single step. This is a second-order reaction overall. Raising the temperature will cause the value of k to decrease. Raising the temperature lowers the activation energy' for this reaction. If the concentrations of both reactants are doubled, the rate will double. Adding a catalyst in the reaction will cause the initial rate to increase.
Compare the functions of homogeneous and heterogeneous catalysts.
Substances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?
Sulfuryl chloride (SO2Cl2) decomposes to sulfur dioxide (SO2) and chlorine (Cl2) by reaction in the gas phase. The following pressure data were obtained when a sample containing 5.00 102 mol sulfuryl chloride was heated to 600. K in a 5.00 101-L container. Time (hours): 0.00 1.00 2.00 4.00 8.00 16.00 PSO2Cl2(atm): 4.93 4.26 3.52 2.53 1.30 0.34 Defining the rate as [SO2Cl2]t, a. determine the value of the rate constant for the decomposition of sulfuryl chloride at 600. K. b. what is the half-life of the reaction? c. what fraction of the sulfuryl chloride remains after 20.0 h?

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