Don't used Ai solution R==kpkdkr + kp-[A][B]Which of the following statements is/are correct about the diffusion-controlledreactions:I- A reaction is diffusion-controlled if kp is greater than krII- A reaction is diffusion-controlled if kp is smaller than krIII- Typically for acid/base neutralization reactions, the rate constant is diffusion-controlled.IV. If the experimental rate constant is smaller than diffusion-controlled rateconstants.A) I, IVB) I, II, IVC) II, IVD) IIIE)II, III

Explanation: In order for the reaction to be called a diffusion-controlled reaction, the value of…

Answered: R == kpkd kr + kp -[A][B] Which of the…

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 acid-catalyzed iodination of acetone CH3COCH3(aq) + I2(aq) CH3COCH2I(aq) + HI(aq) is a common laboratory experiment used in general chemistry courses to teach the method of initial rates. The reaction is followed spectrophotometrically by the disappearance of the color of iodine in the solution. The following data (J. P. Birk and D. L Walters, Journal of Chemical Education, Vol. 69, p. 585, 1992) were collected at 23 C for this reaction. Determine the rate law for this reaction.
What are the rate laws of mechanisms 1 and 2 for oscillating reactions if the second reactions were the rate-determining steps?
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.
1) The rate constant for the gas-phase reaction H2(g) + I2(g) → 2 HI(g) has the value 4.45 x 10-5 mol-1 dm³ s-1. What is the equivalent rate constant in units of molecule-1 cm³ s- 1? 2) The kinetics of the hydrolysis of methyl methanoate, CH3COOCH3, in aqueous solution were investigated by measuring the concentration of the ester after different time intervals. The reaction was found to be first order in the concentration of the ester. Use the data below to determine the rate constant for the reaction (must provide best fit graph). 3600 time, t/s 1800 5400 7200 9000 concentration, c/ (mol dm-3) 0.300 0.191 0.135 0.081 0.055 0.035
10. The rate of change in colour of iodide (yellow) can be measured as it reacts with colourless hypochlorite, OCI (ag): I (aq) + OCI(aq) I0- (aq) + Cl (aq) a. Different concentrations of reactants are combined at the same temperature and the rate of yellow colour disappearance were measured: Rate of colour Trial Initial [I] (mol/L) Initial [OCI(ag)) change (mol/(L s) 0.12 0.18 7.91 x 102 1 0.18 3.95 x 102 0.060 0.090 0.030 9.88 x 103 3 0.24 7.91 x 102 4 0.090 Using the data provided, calculate the value of the rate constant, including units b. Predict the rate of reaction if both reactants have an equal starting concentration of 0.10 mol/1.
6c3. Please solve the following problem, give the relevant equation(s) used and explanation.
answer all parts please
For the 2° reaction H2(g) + I2(g) → 2HI(g) at 650 K, the collisional cross section, sigma H2-I2, is 0.36 nm2, the reducedmass is 3.32 × 10−27 kg, and the activation energy is 171 kJ mol−1. Use collision theory to calculate the rateconstant. If the actual value of the rate constant is 8.4 × 10−6 M-1s-1, determine the steric factor for this reaction.
The enzyme carbonic anhydrase catalyzes the reactionCO2(g) + H2O(l)--->HCO3- (aq) + H+(aq). In water,without the enzyme, the reaction proceeds with a rateconstant of 0.039 s-1 at 25 °C. In the presence of the enzymein water, the reaction proceeds with a rate constantof 1.0 x 106 s-1 at 25 °C. Assuming the collision factor isthe same for both situations, calculate the difference inactivation energies for the uncatalyzed versus enzymecatalyzedreaction.
A typical diffusion constant for small molecules in aqueous solution at 25 °C is 6 × 10−9 m2 s−1. If the critical reaction distance is 0.5 nm, what value is expected for the second-order rate constant for a diffusion-controlled reaction?
For the gas phase isomerization of cyclobutene,(CH2)2(CH)2CH2=CHCH=CH2the rate constant has been determined at several temperatures. When ln k in s-1 is plotted against the reciprocal of the Kelvin temperature, the resulting linear plot has a slope of -1.64×104 K and a y-intercept of 30.1. The activation energy for the gas phase isomerization of cyclobutene is __________kJ/mol.
For the gas phase decomposition of t-butyl alcohol,(CH3)3COH(CH3)2C=CH2 + H2Othe rate constant has been determined at several temperatures. When ln k in s-1 is plotted against the reciprocal of the Kelvin temperature, the resulting linear plot has a slope of -3.30×104 K and a y-intercept of 33.8. The activation energy for the gas phase decomposition of t-butyl alcohol is _____kJ/mol.

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