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511 for cu diffaring in Al the preexponential constant Do - 1.5x10-5 m²% and the activation Thergy is 126,000 Jlnol...
Dr || For Cu diffusing in Al the preexponential constart 0o = 1.5x105 m²% and the...
Dr || For Cu diffusing in Al the preexponential constart 0o = 1.5x105 m²% and the activation Thergy is 126,000 Ilmole. At some temperature the diffusion constant for cu diffusing in AR is 5.9x1015 m/s. Find that temperenture, inoc.
0.950 M-15-1 at 508'T. a. Calculate the activation energy and Arrhenius preexponential factor for this reaction....
0.950 M-15-1 at 508'T. a. Calculate the activation energy and Arrhenius preexponential factor for this reaction. b. What is the value of the rate constant at 400°C? P29 The melting of double-strand DNA into two single strands can be initiated using temperature-jump methods. Derive the expression for the T-jump relaxation time for the following equilibrium involving double-strand (DS) and single-strand (SS) DNA: DS > 25 Skr P30 Consider the reaction
An ingot of Al-5% Cu is directionally solidified. Assume that there is no diffusion in the...
An ingot of Al-5% Cu is directionally solidified. Assume that there is no diffusion in the solid and that there is perfect mixing in the liquid. Pure aluminum melts at 660°C. At the eutectic temperature of 548°C, the liquid composition is 33.2% Cu and the solid composition is 5.35% Cu. Assume that the liquidus and solidus are straight lines. Calculate the composition of the liquid when the solidification is 40% complete. **************use Scheil equation to solve************* What is the average...
5. It is believed that interstitial diffusion is faster than vacancy diffusion. Can you show this...
5. It is believed that interstitial diffusion is faster than vacancy diffusion. Can you show this by comparing the values of diffusion coefficients of a pair of cases (one values for each type of diffusion) from Table 5.2.. -(5 points) Diffusing Species Q. (J/mol) с 87,400 148,000 77,000 168,000 Nº N° Feº Fe Cud Alº Mg Znº Mod Host Metal D, (m/s) Interstitial Diffusion Fe (1 or BCC) 1.1 x 10-6 Fe (I or FCC) 2.3 * 105 Fe (...
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead,...
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, through which oxygen diffuses into their bodies. The tracheae begin at the surface of the insect's body and penetrate into the interior. Suppose that a tracheae is 1.64 mm long with a cross-sectiona area of 2.14 x 10^-9 m^2. The concentration of oxygen in the air outside the insect is 0.626 kg/m^3, and the diffusion...
Question #5 Here are the relevant data to determine the activation energy of the reaction. Rate...
Question #5 Here are the relevant data to determine the activation energy of the reaction. Rate constant (units not shown) Temperature (K) .13 293 0.11 308 Use the data above to determine the activation energy of the reaction? 83 kJ/mol Submit This value is not correct. Please check your calculations and try again. Question #6 Here are your data for trial of Lab 7 (the trial at room temperature without the catalyst): [103 initial (S203 initial Initial Rate .0023 M...
Im supposed to use this table to find it - A steel plate contains 0.62% C...
Im supposed to use this table to find it
- A steel plate contains 0.62% C and the surface is to be carburized to make it more wear resistant. If the carburization takes place such that the surface composition is 2.2% C, how long will it take to have 1.4% C at a depth of 0.75 mm into the plate at a temperature of 450 °C? (Use the data found in tables of Ch. 5 to solve the problem. Diffusing...
question 5,6 part 1 and 2 please Question #5 Here are the relevant data to determine the activation energy of the...
question 5,6 part 1 and 2 please
Question #5 Here are the relevant data to determine the activation energy of the reaction. Rate constant (units not shown) Temperature (K) .13 293 0.11 308 Use the data above to determine the activation energy of the reaction. -3628 kl/mol Submit Please enter your results to the correct precision. Question #6 Here are your data for trial of Lab 7 (the trial at room temperature without the catalyst): [103 initial (S2032 Jinitial Initial...
Rate Determination and Activation Energy DATA TABLE Trial Temperature (°C) Rate constant, (S-1) 0.00157 24 0.007435...
Rate Determination and Activation Energy DATA TABLE Trial Temperature (°C) Rate constant, (S-1) 0.00157 24 0.007435 2 16 3 11 0.005563 4 1. Po above, using Temperce ahd. the rate сон dik, as they axis. 2. Determine the activation energy, Ea, by plotting the natural log of k vs. the reciprocal of absolute temperature. You can calculate 1/T (first convert T to K) and in k manually, or use Excel to do it. You will also need to make a...
A steel plate contains 0.82% C and the surface is going to be carburized. The carburization...
A steel plate contains 0.82% C and the surface is going to be
carburized. The carburization takes place such that the surface
composition is 3.0% C, how long will it take to have 2.4% C at a
depth of 0.55 mm into the plate at a temperature of 560 °C?
Table 5.2 A Tabulation of Diffusion Data Diffusing Species Qd(J/mol 87.400 148,000 се N 77,000 Ne 168,000 Fe Fe 251,000 284.000 200.000 Cud A1 144.000 Host Metal Do(m/s) Interstitial Diffusion...
Dr || For Cu diffusing in Al the preexponential constart 0o = 1.5x105 m²% and the activation Thergy is 126,000 Ilmole. At some temperature the diffusion constant for cu diffusing in AR is 5.9x1015 m/s. Find that temperenture, inoc.
0.950 M-15-1 at 508'T. a. Calculate the activation energy and Arrhenius preexponential factor for this reaction. b. What is the value of the rate constant at 400°C? P29 The melting of double-strand DNA into two single strands can be initiated using temperature-jump methods. Derive the expression for the T-jump relaxation time for the following equilibrium involving double-strand (DS) and single-strand (SS) DNA: DS > 25 Skr P30 Consider the reaction
5. It is believed that interstitial diffusion is faster than vacancy diffusion. Can you show this by comparing the values of diffusion coefficients of a pair of cases (one values for each type of diffusion) from Table 5.2.. -(5 points) Diffusing Species Q. (J/mol) с 87,400 148,000 77,000 168,000 Nº N° Feº Fe Cud Alº Mg Znº Mod Host Metal D, (m/s) Interstitial Diffusion Fe (1 or BCC) 1.1 x 10-6 Fe (I or FCC) 2.3 * 105 Fe (...
Question #5 Here are the relevant data to determine the activation energy of the reaction. Rate constant (units not shown) Temperature (K) .13 293 0.11 308 Use the data above to determine the activation energy of the reaction? 83 kJ/mol Submit This value is not correct. Please check your calculations and try again. Question #6 Here are your data for trial of Lab 7 (the trial at room temperature without the catalyst): [103 initial (S203 initial Initial Rate .0023 M...
Im supposed to use this table to find it
- A steel plate contains 0.62% C and the surface is to be carburized to make it more wear resistant. If the carburization takes place such that the surface composition is 2.2% C, how long will it take to have 1.4% C at a depth of 0.75 mm into the plate at a temperature of 450 °C? (Use the data found in tables of Ch. 5 to solve the problem. Diffusing...
question 5,6 part 1 and 2 please
Question #5 Here are the relevant data to determine the activation energy of the reaction. Rate constant (units not shown) Temperature (K) .13 293 0.11 308 Use the data above to determine the activation energy of the reaction. -3628 kl/mol Submit Please enter your results to the correct precision. Question #6 Here are your data for trial of Lab 7 (the trial at room temperature without the catalyst): [103 initial (S2032 Jinitial Initial...
Rate Determination and Activation Energy DATA TABLE Trial Temperature (°C) Rate constant, (S-1) 0.00157 24 0.007435 2 16 3 11 0.005563 4 1. Po above, using Temperce ahd. the rate сон dik, as they axis. 2. Determine the activation energy, Ea, by plotting the natural log of k vs. the reciprocal of absolute temperature. You can calculate 1/T (first convert T to K) and in k manually, or use Excel to do it. You will also need to make a...
A steel plate contains 0.82% C and the surface is going to be
carburized. The carburization takes place such that the surface
composition is 3.0% C, how long will it take to have 2.4% C at a
depth of 0.55 mm into the plate at a temperature of 560 °C?
Table 5.2 A Tabulation of Diffusion Data Diffusing Species Qd(J/mol 87.400 148,000 се N 77,000 Ne 168,000 Fe Fe 251,000 284.000 200.000 Cud A1 144.000 Host Metal Do(m/s) Interstitial Diffusion...
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