Homework Answers
Add Answer to:
The diffusion coefficient for Ca2+ 1n CaO is 10-20 m2/s at 850°C and 10-13 m2/s at...
A reaction has a rate constant of 1.21×10−4 s−1 at 25 ∘C and 0.226 s−1 at...
A reaction has a rate constant of 1.21×10−4 s−1 at 25 ∘C and 0.226 s−1 at 77 ∘C . Part A Determine the activation barrier for the reaction. Express your answer in units of kilojoules per mole and with 3 significant figures. Ea E a = nothing kJ/mol Request Answer Part B What is the value of the rate constant at 18 ∘C ? Express your answer in units of inverse seconds (s−1) and with 3 significant figures. k k...
The diffusion coefficients for carbon in nickel are given at two temperatures: T (˚C) D (m2/s)...
The diffusion coefficients for carbon in nickel are given at two temperatures: T (˚C) D (m2/s) 600 5.5 × 10-14 700 3.9 × 10-13 (a) Determine the value of D0 in m^2/s (b) Determine the value of Qd in kJ/mol (c) What is the magnitude of D? at 850˚C in m^2/s
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen in Iron at 700°C -8.90E-10 Nitrogen in Iron Heat Treatment Time (hours): = 8 Carburizing Time (hrs): = 7 Steel Alloy Case Depth (mm): 4.8 Steel Alloy New Case Depth (mm) - 9.9 Activation Energy kJ/mol: = 103 Temperature for Problem 3 (Celsius) -809 . Data for Problem 4 Temperature in C: -595 Diffusivity (m2/s) = 5.62E-14 Temperature in C: -702 Diffusivity (m /s)...
1) 2) 3) CaCO3(s) = CaO (s) + CO2 (g) At 658 °C, the reaction reaches...
1)
2)
3)
CaCO3(s) = CaO (s) + CO2 (g) At 658 °C, the reaction reaches equilibrium. If PcO2 =2.17 atm, what is Kc value ? *Please report 3 significant figures. Numbers only, No unit. No scientific notation. The slope and intercept of an Arrhenius plot made for the first-order decomposition reaction are -7865.2 K and 26.098 at 303K, what is the value of the activation energy (KJ/mol) at this temperature? *Please report 3 significant figures. Numbers only, no unit....
A differential nitrogen pressure exists across a 2-mm-thick steel furnace wall. After some time, steady-state diffusion...
A differential nitrogen pressure exists across a 2-mm-thick steel furnace wall. After some time, steady-state diffusion of the nitrogen is established across the wall. Given that the nitrogen concentration on the high-pressure surface of the wall is 5 kg/m3kg/m3 and on the low-pressure surface is 0.3 kg/m3 , calculate the flow of nitrogen through the wall (in kg/m2.h) if the diffusion coefficient for nitrogen in this steel is 1.0 ×10−10m2/s at the furnace operating temperature. Express your answer to three...
The energy of activation for a particular reaction is 11.1 kJ/mol. At 18.9 °C the rate...
The energy of activation for a particular reaction is 11.1 kJ/mol. At 18.9 °C the rate constant of the reaction is 1.67 × 102s.-1 Calculate the temperature (in °C) when the rate constant, k = 4.99 × 103s.-1 R = 8.314472 J⋅mol-1⋅K-1. Report your answer to THREE significant figures.
Part A) A certain first-order reaction has a rate constant of 2.40×10−2 s−1 at 25 ∘C....
Part A) A certain first-order reaction has a rate constant of 2.40×10−2 s−1 at 25 ∘C. What is the value of k at 60 ∘C if Ea = 74.0 kJ/mol ? Express your answer using two significant figures. Part B) Another first-order reaction also has a rate constant of 2.40×10−2 s−1 at 25 ∘C. What is the value of k at 60 ∘C if Ea = 135 kJ/mol ? Express your answer using two significant figures.
Part A Calculate AHxn for the following reaction: Cao(s) + CO2(g) +CaCO3(s) Use the following reactions...
Part A Calculate AHxn for the following reaction: Cao(s) + CO2(g) +CaCO3(s) Use the following reactions and given AH values: Ca(s) + CO2(g) + O2(g) +CaCO3(s), AH =-812.8 kJ 2Ca(s) + O2(g)+2CaO(s), AH = -1269.8 kJ Express your answer using four significant figures. V AE ? AH, = Submit Request Answer
Run at 25.00 °C, the rate constant was found to be 2.300 X 10^-5 1/M sec....
Run at 25.00 °C, the rate constant was found to be 2.300 X 10^-5 1/M sec. Run at 30.00 °C, the rate constant was found to be 3.621 X 10^-5 1/M sec. Calculate the activation energy (Use R=8.315 J/K mol), with units of KJ/mole, and report the answer to 3 significant figures.
If the equilibrium constant (Keq) for a reaction (CaCO3(s) → Ca2+ + CO32-) at 25 °C...
If the equilibrium constant (Keq) for a reaction (CaCO3(s) → Ca2+ + CO32-) at 25 °C is 3.3*10-9, what is the ΔG° for the reaction (round your answer to the nearest kJ/mol)?
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen in Iron at 700°C -8.90E-10 Nitrogen in Iron Heat Treatment Time (hours): = 8 Carburizing Time (hrs): = 7 Steel Alloy Case Depth (mm): 4.8 Steel Alloy New Case Depth (mm) - 9.9 Activation Energy kJ/mol: = 103 Temperature for Problem 3 (Celsius) -809 . Data for Problem 4 Temperature in C: -595 Diffusivity (m2/s) = 5.62E-14 Temperature in C: -702 Diffusivity (m /s)...
1)
2)
3)
CaCO3(s) = CaO (s) + CO2 (g) At 658 °C, the reaction reaches equilibrium. If PcO2 =2.17 atm, what is Kc value ? *Please report 3 significant figures. Numbers only, No unit. No scientific notation. The slope and intercept of an Arrhenius plot made for the first-order decomposition reaction are -7865.2 K and 26.098 at 303K, what is the value of the activation energy (KJ/mol) at this temperature? *Please report 3 significant figures. Numbers only, no unit....
Part A Calculate AHxn for the following reaction: Cao(s) + CO2(g) +CaCO3(s) Use the following reactions and given AH values: Ca(s) + CO2(g) + O2(g) +CaCO3(s), AH =-812.8 kJ 2Ca(s) + O2(g)+2CaO(s), AH = -1269.8 kJ Express your answer using four significant figures. V AE ? AH, = Submit Request Answer
Most questions answered within 3 hours.
-
A researcher in the field of educational psychology obtains a
random sample of 49 fourth grade...
asked 20 minutes ago -
A
liter of liquid soap concentrate sells for 7.2 Yuan in China.
Determine the total volume...
asked 5 minutes ago -
A
person with polycythemia vera ( excess production of red blood
cells) receives radioactive phosphorus-32. Why...
asked 7 minutes ago -
Regression Analysis
Y = Price in $’s for Tracfone service plan
X1 = No. of minutes...
asked 22 minutes ago -
Various computers and operating systems in the past have used
separate instruction and data spaces, allowing...
asked 10 minutes ago -
You have a series of simple polarisers that you can orient as
you choose in succession...
asked 17 minutes ago -
This is a c++ class utilizing class templates
and linked lists. I need to implement the...
asked 24 minutes ago -
How is the Irish banking system different from the rest of
European banks and how does...
asked 25 minutes ago -
Calculate ΔGo for the reaction of ammonia with
oxygen:
4NH3 (g) + 3 O2 (g)...
asked 27 minutes ago -
How do I go from one concentration of cells to another?
In this case, I have...
asked 28 minutes ago -
Old Faithful geyser in Yellowstone Park shoots water hourly to a
height of 49.2 m. With...
asked 42 minutes ago -
What is the difference between Eddy Currents and Induced
Currents? Are they same if yes, how...
asked 44 minutes ago