At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized...
At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for 2.2 h to produce the same diffusion result as at 950°C for 13 h? Assume that values for D0 and Qd are 4.3 × 10-5 m2/s and 139 kJ/mol, respectively.
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At approximately what temperature (in Kelvin) would a specimen
of an alloy have to be carburized...
Problem 5.34 (GO Tutorial) At approximately what temperature (in Kelvin) would a specimen of an alloy...
Problem 5.34 (GO Tutorial) At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for 1.2 h to produce the same diffusion result as at 890°C for 13 h? Assume that values for D0 and Qd are 2.9 x 10-6 m2/s and 157 kJ/mol, respectively. T= K
Current Attempt in Progress At approximately what temperature in Kelvin) would a specimen of an alloy...
Current Attempt in Progress At approximately what temperature in Kelvin) would a specimen of an alloy have to be carburized for 2.7h to produce the same diffusion result as at 760°C for 16 h? Assume that values for D, and Q are 4 1 10*m s and 140 kJ/mol, respectively e Textbook and Media
please answer highlighted part only and detailedely thank you compare and co describe one industrial application...
please answer highlighted part only and detailedely thank
you
compare and co describe one industrial application in which steady state diffusion plays an important role, use sketches as needed; (c) An FCC iron-carbon alloy initially containing 0.22 wt% carbon is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.1 wt% carbon. If after 50.0 hours the concentration of carbon is 0.47 wt% at a position 2.2 mm below the surface, determine...
13. Describe how the following processes are affected by temperature and time, and how diffusion plays a role. Is d...
13. Describe how the following processes are affected by temperature and time, and how diffusion plays a role. Is diffusion a result of concentration gradients in each case? If not tell what is the driving force for atom diffusion with a net flux in one direction (versus random diffusion). a. Sintering refractory metals or ceramics b. Creep of metals or ceramics c. Recharging a battery d. Operation of a fuel cell to produce electricity e. Doping regions of a Si...
Question 5 What effect would a decrease in temperature have on pressure, assuming that volume (T)...
Question 5 What effect would a decrease in temperature have on pressure, assuming that volume (T) and moles of gas (n) are kept constant? Group of answer choices Pressure would decrease. Pressure would stay the same regardless of a change in temperature. Pressure would increase Question 6 Which temperature scale has NO negative values? Group of answer choices Farenheit Digital Kelvin Celcius Question 7 Calculate the number of moles of gas with a volume of 35.0 L at a temperature...
Problem: When alpha-iron is subjected to an atmosphere of hydrogen gas, the concentration of hydrogen in...
Problem: When alpha-iron is subjected to an atmosphere of hydrogen gas, the concentration of hydrogen in the iron, CH (in weight percent), is a function of hydrogen pressure, PH2 (in Mpa), and asbsolute temperature (T) according to CH= 1.34 X 10-2 sqrt(PH2) exp(- (27.2KJ/mol) / RT) Consider a thin iron membrane with the thickness and temperature listed below. Calculate the flux in (kg/(m2-s)) through this membrane if the hydrogen pressure on one side of the membrane is 0.17 MPa, and...
The average temperature of the surface of the Earth is approximately 14◦C. What would the steady-state...
The average temperature of the surface of the Earth is approximately 14◦C. What would the steady-state temperature of the Earth be if there were no greenhouse effect — i.e. if the emissivity of the earth was independent of wavelength? Give your answer in ◦C. Note that the radius of the Earth is 6.38 106 m, and the intensity of sunlight at the Earth’s location is 1366 W/m2. Hint, how much power from the sun would strike a plate with the...
A diffusion couple composed of two silver– gold alloys is formed; these alloys have compositions of...
A diffusion couple composed of
two silver– gold alloys is formed; these alloys have compositions
of 98 wt% Ag–2 wt% Au and 95 wt% Ag– 5 wt% Au. Determine the time
this diffusion couple must be heated at 750°C (1023 K) in order for
the composition to be 2.5 wt% Au at the 50 μm position into the 2
wt% Au side of the diffusion couple. Preexponential and activation
energy values for Au diffusion in Ag are 8.5 × 10−5...
please answer the full thing 1. What would be the AE (in kJ) for the following...
please answer the full thing
1. What would be the AE (in kJ) for the following reaction if 6.300 moles of H20 were decomposed? 2 H2O + 2H2 + O AE = 483.6 kJ (for reaction as written) 2. The value of AE for the reaction below is -336 kJ. Determine the amount of heat (in kJ) evolved when 13.0 g of HCl is formed. CH4(9) + 3 Cl2(g) - CHCI) + 3HCIO) 3. If 1.00 cal = 4.18 J,...
62) Assume that you have a cylinder with a movable piston. What would happen to the gas pressure ...
62) Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you were to do the following? (a) Triple the Kelvin temperature while holding the volume constant (b) Reduce the amount of gas by 1/3 while holding the temperature and volume constant (c) Decrease the volume by 45% at constant T (d) Halve the Kelvin temperature, and triple the volume 63) Assuming that air contains 78.0 percent Ni, 20.0...
Problem 5.34 (GO Tutorial) At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for 1.2 h to produce the same diffusion result as at 890°C for 13 h? Assume that values for D0 and Qd are 2.9 x 10-6 m2/s and 157 kJ/mol, respectively. T= K
Current Attempt in Progress At approximately what temperature in Kelvin) would a specimen of an alloy have to be carburized for 2.7h to produce the same diffusion result as at 760°C for 16 h? Assume that values for D, and Q are 4 1 10*m s and 140 kJ/mol, respectively e Textbook and Media
please answer highlighted part only and detailedely thank
you
compare and co describe one industrial application in which steady state diffusion plays an important role, use sketches as needed; (c) An FCC iron-carbon alloy initially containing 0.22 wt% carbon is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.1 wt% carbon. If after 50.0 hours the concentration of carbon is 0.47 wt% at a position 2.2 mm below the surface, determine...
13. Describe how the following processes are affected by temperature and time, and how diffusion plays a role. Is diffusion a result of concentration gradients in each case? If not tell what is the driving force for atom diffusion with a net flux in one direction (versus random diffusion). a. Sintering refractory metals or ceramics b. Creep of metals or ceramics c. Recharging a battery d. Operation of a fuel cell to produce electricity e. Doping regions of a Si...
A diffusion couple composed of
two silver– gold alloys is formed; these alloys have compositions
of 98 wt% Ag–2 wt% Au and 95 wt% Ag– 5 wt% Au. Determine the time
this diffusion couple must be heated at 750°C (1023 K) in order for
the composition to be 2.5 wt% Au at the 50 μm position into the 2
wt% Au side of the diffusion couple. Preexponential and activation
energy values for Au diffusion in Ag are 8.5 × 10−5...
please answer the full thing
1. What would be the AE (in kJ) for the following reaction if 6.300 moles of H20 were decomposed? 2 H2O + 2H2 + O AE = 483.6 kJ (for reaction as written) 2. The value of AE for the reaction below is -336 kJ. Determine the amount of heat (in kJ) evolved when 13.0 g of HCl is formed. CH4(9) + 3 Cl2(g) - CHCI) + 3HCIO) 3. If 1.00 cal = 4.18 J,...
62) Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you were to do the following? (a) Triple the Kelvin temperature while holding the volume constant (b) Reduce the amount of gas by 1/3 while holding the temperature and volume constant (c) Decrease the volume by 45% at constant T (d) Halve the Kelvin temperature, and triple the volume 63) Assuming that air contains 78.0 percent Ni, 20.0...
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