Q1) Calculate the quantity adsorbed at equilibrium according to first and second order equations for the adsorption of methylene blue dye on charcoal surface at 250C, if the quantity adsorbed at time 15 min. are equal to 19.32 mg/g. The values of first and second order constants are 0.176 min-1 and 0.013 g.mg-1.min-1. Respectively.
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- Early attempts to coat metals with Teflon, poly tetrafluoroethylene, resulted in a polymer layer that peeled off the surface easily. Later attempts gave coatings that were much more durable. What type of adsorption processes are being manifested in either situation? What technical problem had to be solved in order to develop durable coatings?Instantaneous rates for the reaction of hydroxide ion with Cv+ can be determined from the slope of the curve in Figure 11.3 at various concentrations. They are (1) At 4.0 105 mol/L, rate = 12.3 107 mol L1 s1 (2) At 3.0 105 mol/L, rate = 9.25 107 mol L1 s1 (3) At 2.0 105 mol/L, rate = 6.16 107 mol L1 s1 (4) At 1.5 105 mol/L, rate = 4.60 107 mol L1 s1 (5) At 1.0 105 mol/L, rate = 3.09 107 mol L1 s1 (a) What is the relationship between the rates in (1) and (3)? Between (2) and (4)? Between (3) and (5)? (b) What is the relationship between the concentrations in each of these cases? (c) Is the rate of the reaction proportional to the concentration of Cv+? Explain your answer.5. The adsorption of a gas is described by the Langmuir isotherm with K-0.90 kPa" at 25°C. Calculate the pressure at which the fractional surface coverage is 0.62 a) 0.85 kPa b) 2.3 kPa c) 1.2 kPa d) 1.8 kPa
- .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 10¹kindly help me with this problem thank you 2. The following data are for Xenon adsorption on ZSM5 zeolite. Evaluate the constants from thea) Langmuir and b) Freundlich. Which of the isotherm fit the data best? Explain. P(Torr) 47 136 250 364 473 577 680 mass(g) of ZSM5 zeolite/mole of Xenon 1.8832 0.8977 0.6588 0.5692 0.5255 0.4946 0.4715The 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 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 moleculeThe 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 moleculeThe following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Activated carbon mass (g) 1.0119 [ORA) initial (M) [ORA] at equilibrium (М) Sample number 1 0.0096 0.0044 1.0186 0.0289 0.0207 3 1.0360 0.0578 0.0446 4 1.0129 0.0867 0.0721 5 1.0393 0.1156 0.1002 6. 1.0312 0.1445 0.1270 7 1.0198 0.1926 0.1742 0.2227 1.0270 0.2407 1.0252 0.2889 0.1108 1. Try fitting these data using Langmuir Isotherm and obtain K and monolayer of ORA molecules per one gram 2. Try fitting these data using Freundlich Isotherm and obtain its constants 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 molecule
- The data below are for the adsorption of CO on charcoal at 273K. Calculate the volume, in cm³, corresponding to complete surface coverage assuming that the adsorption of CO on charcoal follows the Langmuir equation. P/mm Hg 100 200 300 400 500 600 700 V/cm³ 10.2 18.6 25.5 31.4 36.9 41.6 46.1 Mass of sample of charcoal: 3.022 g; in each case, V has been corrected to 1 atm.The decomposition of ammonia on Pd.13 surface is occurring, in which, the ammonia is dissociated over the surface as: 2 NH, - N2+3 H2. The N2 gas species is also adsorbed on the surface, whereas the H, is not adsorbed on Pd surface. The rate law and how it reduces if the amount of N2 adsorbed is greatly larger than that * :of ammonia on surface, respectively are Rate =k K,[NHJ/(1+K,[NH]+Kg[N‚]): Rate =k K,[NH,J/K,[N,] Rate =k K,[NH,]/(1+K,[NH,]+K,[H,J): Rate =k K,[NH3]/K,[N,] Rate =k K,[NHJ/(1+K,[NH,]+K,[H,]): Rate =k K,[NH,]/(1+K,[H]) Rate =k K,[NH3]/(1+K,[NH,]+K3[N‚]): Rate =k K,[NH,J/(1+K,[N,])The test data for a reaction with a heterogeneous catalysis (weak adsorption character) using 0.01g of activated carbon in a total solution volume of 15 mL are given below. Using the experimental data; a) The order of the reaction b) The half-time of the reaction c) The rate constant of the reaction d) Determine whether the adsorption isotherm conforms to the Langmuir isotherm. If it fits, calculate the adsorption capacity. t/sec C/molar 0 11,1 7 6,5 10 5,1 20 2,4 40 0,5 60 0,1