A thin film of Co was deposited on the end of a long cylinder of Fe3O4. Afterwards, the cylinder was annealed for 20 hours and then the Co concentration was measured. The Co concentration values are given in the table. Calculate the diffusion coefficient of Co in Fe3O4 at the annealing conditions. x (um) C(x,t) (mol/cm³) 7.78x10-4 20 40 7.33x10-4 60 6.64x10-4 80 5.78x10-4
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- Benzene on graphite follows the Langmuir isotherm. At a pressure of 1 atm, theThe volume of benzene adsorbed on a sample of graphite was 4.2 mm3 atconditions T = 0°C and 1 atm. At 3 atm it was 8.5 mm3. Suppose 1 molecule ofbenzene occupies 30Å and estimate the surface area of graphite.6. A dilute silver nitrate solution is added to a slight excess iodide solution. A solution of AgI is face adsorbs.chemohollic.com formed whose surface adsorbs. (a) I (b) NO3 + (c) Nat (d) Ag*The diffusivity of iron atoms in the BCC atoms in the BCC Fe lattice is 4.2*10-23m2/sec at 400oC and 5.6*10-16m2/sec at 800oC. Calculate the activation energy in kilojoules per mole for the diffusion of iron atoms in the BCC Fe lattice in the temperature range.(upto two decimal places)
- .A plot of a Langmuir adsorption isotherm (C/q vs 1/Q) for an adsorption process, gives a slope of 0.208 and intercept of 250. Calculate the adsorption capacity at equilibrium corresponding to monolayer coverage (0) A) 0.002 B) 4.8 C) 52 D) 1.2 x 10¹A + B = A-B The formation of non-covalent complexes in water is a fundamental reaction in bioorganic chemistry. For reactions where A or B (or both) are proteins, kon is often in the neighborhood of 1.00 x 10° M-'s-1 (an approximate value for the diffusion limit). Using this value of kon, determine the half-life in seconds of the following common biochemical complexes (A-B) obtained from an antibody which binds a viral protein with Ka = 5.00 × 10-7 M. t12 =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
- The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample Activated carbon mass (g) 1.0119 [ORA) initial (M) [ORA] at equilibrium (М) 0.0044 number 0.0096 1.0186 1.0360 0.0289 0.0207 3 0.0578 0.0446 0.0721 0.1002 4 1.0129 0.0867 1.0393 0.1156 1.0312 1.0198 0.1445 0.1926 0.2407 0.2889 0.1270 7 1.0270 1.0252 0.1742 0.2227 0.1108 8 1. Try fitting these data using Langmuir Isotherm and obtain K and monolayer of ORA molecules per one gram 3. Which isotherm describe best the adsorption of ORA on activated carbon and why? 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 moleculeHydrogen purification was conducted at 550 °C using a 3-mm-thick palladium sheet having an area of 0.25 m?. (a) Calculate the diffusion coefficient of hydrogen in palladium at this temperature. The preexponent and the activation energy are 12,000 J/mol and 6.5 x 108 m?/s, respectively. R = 8.3145 J/mol-K. (b) When the steady-state condition was attained, hydrogen concentrations at the high- and low-pressures side of the plate were 1.7 and 0.5 kg/m³. Compute the amount of hydrogen that passes through the sheet per hour (in kg/h).kindly help me with this problem Thank you! Subject: Physical Chemistry Instructions: solve as neatly as possible and show complete solution.No rounding-off for your decimals (include all decimals in your calculator in your computation). The following data were obtained for the adsorption of acetone on charcoal from an aqueous solution at 180C. Y (millimoles/g) C (millimoles/liter) 0.208 2.34 0.618 14.65 1.075 41.03 1.5 88.62 2.08 177.69 2.88 268.97 a) Find the constants k and n of the Freundlich equation. b) Find the constants a and b in the Langmuir equation. c) Find the constants k and n in the Temkin isotherm. d) Which of the isotherm fit the data best?
- а. Identify THREE (3) isotherm shapes that are typically encountered in an adsorption process for a single adsorbate and illustrate the behavior through equilibrium relations.what is solution homogenous catalysis?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