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) 20 7.78x10-4 40 7.33x10-4 60 6.64×10-4 80 5.78x10-4
Q: Carbon is allowed to diffuse through a steel plate 13 mm thick. The concentrations of carbon at the…
A:
Q: A water sample was analyzed for Fe content using the iron-phenanthroline method. The following data…
A:
Q: Cell A has a surface area of 50 um? and a volume of 10 um. Cell B has a surface area of 14 um and a…
A: For the cell A, the SA:V is calculated as shown below. For the cell A, the SA:V is 5μm-1.
Q: concentration of 1.8 kg/m3, with the concentration of copper in the lixiviant that is irrigated onto…
A: Given: Average grade is 0.7% Total pregnant solution is 8000 m3/hr Average concentration can be 1.8…
Q: Chromium(III) sulfate is used for decorative plating. Determine the amount of time in hours needed…
A: Given: The surface area and the thickness of the object is 68.4 cm2 and 24.2 μm, respectively. The…
Q: 0.5M HA electrolyte with a degree of dissociation of 0.2; It is placed in a conductivity cell with a…
A: Given: Molarity of electrolyte = Normality of electrolyte (because it is monobasic) = 0.5 M
Q: From the curves shown in Animated Figure and using the following Equation, determine the rate of…
A:
Q: GRAVIMETRIC ANALYSIS The addition of dimethylglyoxime, H2C4H602N2, to a solution containing…
A: The chemical equation for the reaction is, Ni2+ + 2H2C4H6O2N2 ---> 2H+ + Ni(HC4H6O2N2)2 From…
Q: A layer of 10 g of iodine is spread uniformly over a surface of area 10 cm? and covered in hexane to…
A: Given: Mass of iodine= 10g Area = 10cm3 Depth = 10 cm Diffusion coefficient = 4.04 * 10-9 m2/s To…
Q: Rank the following iron–carbon alloys and associated microstructures from the highest to the lowest…
A:
Q: Which of these types of coprecipitation happens with greater probability when the particle growth of…
A: There are four types of method through which crystal growth happens- 1- mixed crystal formation 2-…
Q: The bonding strength at the coating and substrate interface can significantly affect the performance…
A: Interpretation - Processing parameter in CVD that affect the interfacial bonding strength- How…
Q: 4.Magnetic property Ir°: (Xe) 6s² 4f14 5d7 [Ir(NO2)613- [ Select ] [IrBr3- 5. Both [Ni(CN)4]²- and…
A: 4. (II)
Q: A sheet of steel 1.8 mm thick has nitrogen atmospheres on both sides at 1200°C and is permitted to…
A: Given, The thickness of a sheet = 1.8 mm Temperature = 1200 0C The diffusion coefficient for…
Q: list at least 10 scientific journals of chemical analysis of a certain analyte using a specific…
A:
Q: You are centrifuging a test tube of spherical cells in a buffer solution. The buffer viscosity and…
A: Given: Viscosity of buffer=0.02 Pa.s Diameter of cell=4.5 μm Density of cell=1.2 g/cm3 Density of…
Q: What is the diffusion coefficient of a membrane-bound protein of molar mass 79,300 daltons at 37°C…
A: The exact solution is given below
Q: absorbance data that you have obtained while doing an experiment studying the diffusion of potassium…
A: A numerical problem based on quantitative analysis, which is to be accomplished.
Q: According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, this…
A: We are to discuss what was the secret ingredient of concrete used by Romans, and discus about strain…
Q: Carbon is allowed to diffuse through a steel plate 12 mm thick. The concentrations of carbon at the…
A:
Q: Copper and gold do not form a complete solid solution. At the compositions of 25 and 50 atomic…
A: In the phase diagram of two metals, the x-axis represents the weight percentage of metals and y-axis…
Q: The viscosity of methane at 20 °C and 1 atm pressure is 1.09x10-4 Calculate a) The mean path in…
A: Solution -
Q: 3- A sheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200 °C and is permitted…
A: CONCENTRATION PROFILE: A diagram which denotes the immensity of the concentration with respect to…
Q: In HPLC columns .a O plate height increases as the particle size of the packing material decreases…
A: Q.1: In high performance liquid chromatography (HPLC) columns, decreasing the particle size of the…
Q: In a carbunizing process, an initially 0 2% C steel gear is placed in an atmosphere that provides 1…
A: Given data is Cx = 0.45 C0 = 0.2 Cs = 1.3 Activation Energy = 148000 J/mol Pre exponential factor :…
Q: A plot of Langmuir has been carried out for the adsorption of gas X onto platinum metal. The plot…
A:
Q: The addition of dimethylglyoxime, H2C4H602N2, to a solution containing nickel(II) ion gives rise to…
A: To calculate the sample size that should not be exceeded when analyzing these alloys for nickel.
Q: The diffusion coefficient of valine in water at 298 KKis 0.831×10−9m2⋅s−10.831×10−9m2⋅s−1. Determine…
A: The equation of time taken by a molecule is derived from Pythagorean theorem under assumption that…
Q: The thermal conductivity of carbon dioxide at 0 ºC is 0.0145 J K-1m-1 s-1. Estimate the diameter of…
A: The solution of the question is given below:
Q: In a sample of MgO held at 1500°C grains of MgO grew from 1um diameter to 10 um diameter in 1 hour.…
A: Answer: In given data: T = 15000C, diameter= 1 to 10 um. time = 1.0 hrs. Diffusion energy = 250…
Q: Cells in the front of the cornea obtain their oxygen from the air. Wearing contacts can interfere…
A:
Q: 7.10 A simple cubic (a = 0.3 nm) substrate has been cut along the (100) at a 3° angle to create a…
A: Answer: Yes. Explanation: Diffusion length is calculated as follows: 'L = (Dt)1/2' D is the…
Q: Below is a set of absorbance data that you have obtained while doing an experiment studying the…
A: Given:
Q: The viscosity of mercury at 20 °C is 1.554 cP and 1.450 cP at 40 °C. What is the energy of…
A: Given that Viscosity = 1.554 cP at temperature of 20oC (or 393.25K) Viscosity = 1.450 cP at…
Q: Using silicon dioxide as the diffusion mask: How much oxide is required as a barrier layer for this…
A: Given: the isolation diffusion in a bipolar process uses a 15hr-boron diffusion at 1100 °C into a…
Q: What factor(s) will affect the magnitude of hysteresis of sorption isotherm? I. The nature of food.…
A: factor(s) will affect the magnitude of hysteresis of sorption isotherm
Q: When the diffusion test is performed in the setup in the figure, a white smoke is formed at point B…
A: According to Graham's law rate of diffusion/effusion is inversely proportional to square root of its…
Q: Which of the following statements about the van Deemter equation H= A+ Blu+ Cu is incorrect? O A.…
A:
Q: Carbon tetrachloride (CCl4) is diffusing through benzene (C6H6), as the drawing illustrates. The…
A:
Q: A thin film of Co was deposited on the end of a long cylinder of Fe3O4. Afterwards, the cylinder was…
A: Concept: Diffusion coefficient can be calculated using Fick's Law. J =DdcdxOn rearranging, we…
Q: 6. About diffusion; (a) Briefly explain the concept of a driving force. (b) What is the driving…
A:
Q: Surface agents that prevent particle agglomeration are: A. Pathogens b. foaming C. ATP d.…
A: Surface agents that prevent particle agglomeration are given below.
Q: The time of efflux of water through an Ostwald viscometer is 0.60 minutes. For the same volume of an…
A: Given data runoff time for water : tw=0.60 min runoff time of organic liquid : torg=1.25 min density…
Q: -17 The diffusivity of silver in solid silver metal is 1.0 x 10 m -13 2 Is at 500°C and 7.0 x 10 m…
A: Given, The diffusivity of silver in solid silver metal = 1.0 × 10^-17 m2/s at 500 degree Celsius.…
Q: The efflux time of glycerin sample is 320 seconds having a density of 1.26 grams per mL. This is…
A:
Q: 5. About 2D defects; (a) Is surface energy greater, the same as, or less than the grain boundary…
A:
Q: Aromatic molecules like those in perfume have a diffusion coefficient in air of approximately 2 x…
A:
Q: .24. The surface of a forging made from a 4340 steel is unexpectedly subjected to a quench rate of…
A: The surface of a forging made from a 4300 steel is unexpectedly subjected to a quench rate of…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- The adsorption equilibrium isotherm for aqueous phenol solution and activated carbon can be determined from the following data: c kg phenol/m3 solution q kg phenol/kg carbon 0.3220 0.150 0.1170 0.122 0.0390 0.094 0.0061 0.059 0.0011 0.045 Determine the appropriate isotherm for this experimental runThe 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)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
- 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..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 10¹VII- 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 www.km. C in graphite 10-10 10-11 10-12 10-13 10-14 Temperature (°C) 2000 1500 1200 1000 900 800 700 10-15 MERRUTITE H in FCC iron 4 5 C in FCC iron Ca in Cao Mg in MgO Fe in FCC iron Fe in BCC iron 6 7 8 9 104 T(K) 600 H in BCC iron C in BCC iron Fe in FeO 500 10 11 12 13
- A + 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 =Below is shown a plot of the logarithm (to the base 10) of the diffusion coefficient versus reciprocal of the absolute temperature, for the diffusion of iron in chromium. Determine values for the activation energy and preexponential. Diffusion coefficient (m²/s) 10-15 10-16 0.55 x 10-3 Activation energy Preexponential 0.60 x 10-3 Reciprocal temperature (1/K) i i 0.65 x 10-3 0.70 x 10-3 J/mol m²/sFor the adsorption of a substance A from aqueous solution by charcoal at 25C, the Freundlich constants are n = 3.0 and k = 0.50 for y in grams per gram and C in g L-1. What weight of A will be adsorbed by 2 g of charcoal from 1 L of a solution containing originally 2 g of substance? Answer is [1 g]
- The enthalpy of adsorption of NH3 on Cu metal is found to be -200kJ/mole. The lifetime of NH3 molecule on Cu metal surface at 600K is? 200 s 2583 s 3.87x10^-32 s 40x10^-14 skindly 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?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