(e) The figure below shows diffusion coefficients for various atoms in metals. Find the activation energy of diffusion of C in a-Fe. The activation energy of Fe in a-Fe is 251 kJ/mol. Which is higher? Explain why it is higher. (m²/s) Diffusion coefficient 10-8 1500 1200 1000 800 10-10 10-12 10-14 10-16 10-18 10-20 0.5 Ciny-Fe Fe in y-Fe Zn in Cu Fe in a -Fe 1.0 Temperature (°C) 600 500 Cina-Fe Cu in Cu 400 Al in Al 1.5 Reciprocal temperatu (1000/K) 300 2.0

(e) The figure below shows diffusion coefficients for various atoms in metals. Find the activation energy of diffusion of C in a-Fe. The activation energy of Fe in a-Fe is 251 kJ/mol. Which is higher? Explain why it is higher. (m²/s) Diffusion coefficient 10-8 1500 1200 1000 800 10-10 10-12 10-14 10-16 10-18 10-20 0.5 Ciny-Fe Fe in y-Fe Zn in Cu Fe in a -Fe 1.0 Temperature (°C) 600 500 Cina-Fe Cu in Cu 400 Al in Al 1.5 Reciprocal temperatu (1000/K) 300 2.0

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

Chapter12: Chemical Kinetics

Section: Chapter Questions

Problem 78E

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The oxidation of iodide ion by the hypochlorite ion in the presence of hydroxide ions I(aq) + ClO(aq) IO(aq) + Cl(aq) was studied at 25 C, and the following initial rates data (Y. Chia and R. E. Connick, Journal of Physical Chemistry, Vol. 63, p. 1518, 1959) were collected: (a) Determine the rate law for this reaction. (b) One mechanism that has been proposed for this reaction is the following: Show that the rate law predicted by this mechanism matches the experimentally determined rate law in part a. (Note that when writing the expression for K the equilibrium constant, [H2O] is not involved. See Chapter 15.)
The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample number [ORA) initial (M) [ORA] at equilibrium Activated carbon mass (M) (g) 1.0119 0.0096 0.0044 1 2 1.0186 1.0360 0.0289 0.0578 0.0207 3 0.0446 4 1.0129 0.0867 0.0721 1.0393 1.0312 0.1002 0.1270 0.1742 0.1156 6. 0.1445 7 1.0198 0.1926 8 1.0270 1.0252 0.2407 0.2227 0.2889 0.1108 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm2, determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
Question 2) a. Cite two diffusion mechanism in crystalline solids, and Using schematic representation explain how these mechanisms function. b. The diffusion constant, Do, and the activation energy, Q, for the diffusion of iron in cobalt are 1.1 x 105 m?/s, and 253300 J/mol, respectively. R=8.31 J/mol. Determine the temperature at which the diffusion coefficient will have a value of 2.1x 1014 m²/s.
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The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample Activated carbon mass [ORA) initial (M) (g) 1.0119 [ORA] at equilibrium (M) 0.0044 number 1 0.0096 1.0186 0.0289 0.0207 3 1.0360 0.0578 0.0446 1.0129 1.0393 4 0.0867 0.0721 5 0.1156 0.1002 0.1445 0.1926 6 1.0312 0.1270 1.0198 0.1742 8 1.0270 0.2407 0.2227 9. 1.0252 0.2889 0.1108 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm², determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
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The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample number [ORA) initial (M) [ORA] at equilibrium Activated carbon mass (М) (g) 1.0119 0.0096 0.0044 2 1.0186 1.0360 0.0289 0.0578 0.0207 0.0446 3 4 1.0129 0.0867 0.0721 1.0393 1.0312 1.0198 1.0270 1.0252 0.1002 0.1156 0.1445 0.1270 0.1742 0.2227 7 0.1926 8 0.2407 0.2889 0.1108 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm, determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
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