For the reaction shown, the rate of reaction when X=Cl is about the same as that when X=Br. Based on this information, which statement represents a valid deduction concerning the mechanism of this reaction? OCH2CH3 O2N NO2 NO2 (A) This is a one-step displacement reaction (B) The reaction proceeds via a benzyne intermediate (C) The C-X bond is broken in the rate-determining step (D) The C-X bond is NOT broken in the rate-determining step O2N OCH,CH3 NO2 NO2

For the reaction shown, the rate of reaction when X=Cl is about the same as that when X=Br. Based on this information, which statement represents a valid deduction concerning the mechanism of this reaction? OCH2CH3 O2N NO2 NO2 (A) This is a one-step displacement reaction (B) The reaction proceeds via a benzyne intermediate (C) The C-X bond is broken in the rate-determining step (D) The C-X bond is NOT broken in the rate-determining step O2N OCH,CH3 NO2 NO2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

rate law for hte reaction : RX + H20→ R0H + HX , rate =K[RX]. the rate of reaction will be doubled when: (a) concentration of H2O is doubled (b)concentration of RX is reduced to half (c) concentration of RX is doubled (d) none of these also give reason for your answer
4. Which of the following statements is incorrect? (A) The rate of a homogeneous reaction is a function of all temperature, pressure and composition. (B) Arrhenius equation shows the variation of rate constant with temperature. (C) Molecularity of a reaction can have a fractional value. (D) If 'n' is the order of reaction, then unit of rate constant is 1/(time)/(concentration)n-1. 5. A molecule have reacted or disappeared when through this method by changing its configuration. (A) Combination(C) Isomerization (B) Decomposition (D) Isolation 6. Rate constant “k” and absolute temperature “T” are related for transition theory as (A) kαTe(-E/RT) (C) kαT2e(-E/RT) (B) kαT0.5e(-E/RT) (D) kαT2.5e(-E/RT) Please answer all!
(1) The activation energy for the gas phase isomerization of methyl cis-cinnamate is 174 kJ.cis-C6H5CH=CHCOOCH3trans-C6H5CH=CHCOOCH3The rate constant at 621 K is 8.10×10-5 /s. The rate constant will be 8.42×10-4 /s at_____ K. (1b) The activation energy for the gas phase isomerization of methyl cis-cinnamate is 174 kJ.cis-C6H5CH=CHCOOCH3trans-C6H5CH=CHCOOCH3The rate constant at 654 K is 4.57×10-4 /s. The rate constant will be /s at _______ 695 K.
The activation energy for the isomerization reaction ofCH3NC in Problem 14 is 161 kJ mol-1, and the reactionrate constant at 600 K is 0.41 s-1.(a) Calculate the Arrhenius factor A for this reaction.(b) Calculate the rate constant for this reaction at 1000 K.
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The fastest step in a reaction is called the rate-determining step. As a reaction progresses its rate goes up. The rate of a reaction is independent of temperature. As a reaction progresses its rate goes down. Reactions involving very unstable combinations of chemicals have small rate constants. Reaction rates decrease with increasing temperature.
1. Which of the following statements is incorrect? (A) The reaction in which the rate equation corresponds to a stoichiometric equation is called an elementary reaction. (B) Molecularity of a reaction may not be equal to the order of reaction. (C) With increase in temperature, the rate constant obeying Arrhenius equation decreases. (D) Rate of a chemical reaction is independent of the concentration of the reactants for a zero order reaction. 2. The rate of a gas phase reaction is given by, kCACB. If the volume of the reaction vessel is reduced to l/3rd of its initial volume, then the reaction rate compared to the original rate will be _____ times. (A) 3 (C) 6 (B) 9 (D) 12 3. A given number of molecules (i.e., moles) of a particular chemical species have reacted or disappeared when any of the following occurs except (A) Combination (C) Isomerization (B) Decomposition (D) Isolation Please Answer all!
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion.Reactions involving very unstable combinations of chemicals have large rate constants.Concentrations of homogeneous catalysts have no effect on reaction rates.Reaction rate constants are independent of temperature.The slowest step in a reaction is called the rate-determining step.A balanced chemical reaction is necessary to relate the rate of reaction to the concentration of a reactant.Slow reactions can be speeded up by raising the temperature.
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The fastest step in a reaction is called the rate-determining step. As a reaction progresses its rate goes up. The rate of a reaction is independent of temperature. As a reaction progresses its rate goes down. Reactions involving very unstable combinations of chemicals have small rate constants. O Reaction rates decrease with increasing temperature. x
1. Which of the following statements is incorrect? (A) As the chemical reaction proceeds, the rate of reaction increases. (B) The reaction rate almost gets doubled for 10°C rise in temperature. (C) For a first order chemical reaction, the rate constant has unit of time-1. (D) Chemical kinetics can predict the rate of a chemical reaction. 2. In a chemical reaction, represented by A → P, it is observed that the rate of reaction increases by a factor of 4 on doubling the concentration of the reactant. The rate of reaction increases by a factor of 9 on trebling the concentration of the reactant. Then the rate of the reaction is proportional to (A) CA (B) CA2 (C) CA3 (D) CA4 3. An elementary reaction has the stoichiometric equation A + 2B = P. What is the order of reaction (A) 0 (B) 1 (C) 2 (D) 3 4. It states that the rate of a chemical reaction is directly proportional to the product of the activities or concentrations of the reactants. (A) Law of mass action…
The mechanism for the reaction of CH3OH andHBr is believed to involve two steps. The overallreaction is exothermic.Step 1: Fast, endothermicCH3OH + H+ uv CH3OH2+Step 2: SlowCH3OH2+ + Br− n CH3Br + H2O(a) Write an equation for the overall reaction.(b) Draw a reaction coordinate diagram for thisreaction.(c) Show that the rate law for this reaction isRate = k[CH3OH][H+][Br−].
The rate law for the reaction NO₂ (g)+CO(g) → NO(g)+CO₂ (g) is rate k[NO₂]² ; one possible mechanism is shown on p. 717.(a) Draw a reaction energy diagram for that mechanism, giventhat ΔH°overall =-226 kJ/mol.(b) Consider the following alternative mechanism:Is the alternative mechanism consistent with the rate law? Isone mechanism more reasonable physically?
(а) (b) (c) (d) all react at same rate