VII- Determine the values for the activation energy and the pre-exponential for thediffusion of C in FCC iron.Diffusion coefficient D (cm²/s)10-310-410-510-610-710-810-9www.km. C in graphite10-1010-1110-1210-1310-14Temperature (°C)2000 1500 1200 1000 900 800 70010-15MERRUTITEH in FCC iron4 5C in FCC ironCa in CaoMg in MgOFe in FCC ironFe in BCC iron6 7 8 9104T(K)600H in BCC ironC in BCC ironFe in FeO50010 11 12 13

The Arrhenius equation is a mathematical formula that describes how the rate of a chemical reaction…

VII- Determine the values for the activation energy and the pre-exponential for the diffusion of C in FCC iron. Diffusion coefficient D (cm²/s) 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-11 10-12 10-13 10-14 10-15 Temperature (°C) 2000 1500 1200 1000 900 800 700 600 C in graphite 5 Mg in MgO Ca in Cao H in FCC iron C in FCC iron 6 Fe in FCC iron 78 Fe in BCC iron 9 104 T (K) H in BCC iron C in BCC iron Fe in FeO 500 10 11 12 13

VII- Determine the values for the activation energy and the pre-exponential for the diffusion of C in FCC iron. Diffusion coefficient D (cm²/s) 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-11 10-12 10-13 10-14 10-15 Temperature (°C) 2000 1500 1200 1000 900 800 700 600 C in graphite 5 Mg in MgO Ca in Cao H in FCC iron C in FCC iron 6 Fe in FCC iron 78 Fe in BCC iron 9 104 T (K) H in BCC iron C in BCC iron Fe in FeO 500 10 11 12 13

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...

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Chemistry The hydrolysis of a substance is catalyzed by hydrogen ions and the velocity constant is equal to: k / dm3 mol-1 s-1 = 4.7 x 10-2 ([H +] / mol dm-3). When the substance is dissolved in a 10-3 M HA acid solution the velocity constant becomes 3.2 x 10-5 dm3 mol-1 s-1. Calculate the dimension constant of the HA acid.
An experiment was performed in a similar manner as Experiment 4 (The Hydrolysis of t-Butyl Chloride). The following data was obtained: Total Time (s) Volume NaOH Titrant used (mL) 46 2.01 91 3.97 131 5.98 175 8.03 220 10.00 266 11.99 311 14.01 357 15.97 401 17.98 450 20.02 Final Volume NaOH to fully react sample: 85.01 mL Assume the proposed reaction mechanism in the experimental procedure is correct. Based on the above measurements, how many minutes would it take for the solution to reach 81.0% completion? Round your final answer to two decimal places.
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(c) Batch adsorption of 900 mg/L phenol was studied at 298 K using 50 mL aliquot at an optimized dose of 1.5 g of activated carbon. What is the adsorption capacity in mg/g at an equilibrium concentration of 650 mg/L?
In a study of the decomposition of ammonia on a platinum surface at 856 °C NH3¬1/2 N2 + 3/2 H, the following data were obtained: NH3), M 1.95x10-3 1.50x103 9.75x10-4 1.75x103 7.80×10-3 3.90x10-3 seconds 0 1000 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 7.80×103M is s and when the starting concentration is 3.90×103 Mis (2) The average rate of disappearance of NH3 from t= 0 s to t= 1000 s is ]Ms!. (3) The average rate of disappearance of NH3 from t= 1000 s to t= 1.50×103 s is ]Ms!. (4) Based on these data, the rate constant for this v order reaction is Ms!
The viscosity of water at 25oC is 2.890´10-2 Kg/m/s. Calculate the value of activation energy (Ea) for molecular motion in the solution. (ho= 1.547´10-2 Kg/m/s; R=8.314 J/K/mol)
To study the photochemical decomposition of aqueous bromine exposed to bright sunlight, we dissolved a small amount of liquid bromine in water contained in a glass jar and placed under direct sunlight. The following data were obtained at 25\deg C:\table [[Tiempo (min ), 10, 20, 30, 40, 50, 60], [Ppm, 2.45, 1.74, 1.23, 0.88, 0.62, 0.44]] Determine the reaction rate order and the specific reaction rate constant: a) Differential method ( The method for obtaining the derivatives is left to your decision) Tiempo (min) Ppm Br₂ 10 2.45 20 1.74 Ć 30 1.23 40 0.88 50 0.62 60 0.44
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19. The lattice diffusion coefficient for Al ions in Al₂O₁ is 4.0x10¹4 cm²/s at 1400°C and the activation energy is 580 kJ/mol. Assuming that sintering is controlled by lattice diffusion of Al > estimate the initial rate of sintering for an alumina powder compact of 1 um particles at 1300°C. 30
Given Zn(s)| Zn 2+ (aq) (1M) || Ag+2+ (aq) (1M) | Ag (s) Eocell = 1.562V What will the Ecell be if the [Zn2+] = 0.75M and [Ag+] =0.25 M at 40.00oC (313.15K)? The overall reaction is Zn(s) + 2 Ag+ (aq) --> 2 Ag (s) + Zn 2+ (aq) (Answer has 3 digits after the decimal)