Homework Answers
1)None of the statements in Question 1 are untrue as all of the conditions hold in steady state diffusion.
2)The driving force for steady state diffusion is the concentration gradient.
We can check these from the Fick’s first law : the flux along direction x is:
J= -D dC/dx
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QUESTION 1 Which statement is not true about the concept of steady state diffusion as it...
Question 3 2 pts Select all statements that are true with respect to steady and non...
Question 3 2 pts Select all statements that are true with respect to steady and non steady-state diffusion. Self-diffusion of Fe is slower than diffusion of Cin Fe In non steady-state diffusion, diffusion flux into the system is equal to diffusion flux out. Self-diffusion can be monitored by use of radioactive isotopes High density materials will have faster diffusion than low density materials Concentration gradient is a driving force for diffusion
The steady-state diffusion flux through a metal plate is 5.4 x 10 at a temperature of...
The steady-state diffusion flux through a metal plate is 5.4 x 10 at a temperature of 727°C and when the I mis concentration gradient is - 3 : Calculate the diffusion flux (same units as flux provided) at 1027°C for the same . Y concentration gradient and assuming an activation energy for diffusion of 125,000 J/mol. Enter your answer in scientific notation with 2 decimal places e.g. 1.2E-3
Diffusion Mechanisms - Nonsteady State Diffusion - Copy Learning Goal: To learn how the diffusion rate...
Diffusion Mechanisms - Nonsteady State Diffusion - Copy Learning Goal: To learn how the diffusion rate changes in dynamic conditions where the diffusion profile changes with time, and how in some cases it can be modeled easily In steady stadision, the concentration Cis a function only of position (not of time). When usion is nonsteady Cis a function of position and time, Oix Nonsteady state diffusion in one direction can be modeled using Fick's Second Law -D where is the...
1-7 thanks in advance 1 - Answer the following questions on the attached answer sheet: 1....
1-7
thanks in advance
1 - Answer the following questions on the attached answer sheet: 1. BCC materials have the following family of slip systems: a. (111)<110> b. (110) <111> C. (211}<110> d. (0001)<1120> 2- Slip is most likely to occur on: a. The most densely packed plane along the least densely packed direction b. The most densely packed plane along the most densely packed direction C. The least densely packed plane along the most densely packed direction d. The...
QUESTION 1 The binary gaseous diffusion coefficients of air in methyl chloride CH;Cl at 298 K...
QUESTION 1 The binary gaseous diffusion coefficients of air in methyl chloride CH;Cl at 298 K and 1 atm have been determined. A simple diffusion cell was used, in which concentration changes of the diffusing gas were followed by infrared spectro- photometre. The diffusion coefficient DAB value measured is 1.434 x10 m2/s a) State two assumption of kinetic gas theory (4 Marks) b) Determine the diffusion coefficient, DAB using Chapman Enskog calculated by a kinetic theory equation using the Lennard-Jones...
Question 1 (1 point) Which of the following statements about acids is NOT true? a) An...
Question 1 (1 point) Which of the following statements about acids is NOT true? a) An acid increases the concentration of hydronium in solution. b) An acid is a proton donor. c) An example of an acid is HBr. d) An acid increases the concentration of protons in solution. e) An acid increases the concentration of hydroxide in solution. Question 2 (1 point) Which of the following changes in blood pH would you expect to observe in a hyperventilating patient,...
please help Question 23 (1 point) Which observation is NOT explained by the intermediate disturbance hypothesis...
please help
Question 23 (1 point) Which observation is NOT explained by the intermediate disturbance hypothesis In the interior of an old forest a low number of K-type species dominate the community Species evenness is larger when disturbances are extremely frequent Species richness increases immediately after a disturbance such as a fire, but may decrease later In beach dune environments, a low number of r-type species dominate the community Question 24 (1 point) Some birds follow moving swarms of army...
can anyone help me with these questions for ecology. thanks! the 1000 IN-dN/dt A Population size...
can
anyone help me with these questions for ecology. thanks!
the 1000 IN-dN/dt A Population size the dN/dt = IN (K-N)/K y = 164.170.1387x bio Number of individuals 10 3512 909 95209 Time FIGURE 1 29 3 10 Time years FIGURE 4 Population densities of individual species 000.01 Environmental gradient- (such as temperature or moisture) 09 FIGURE 2 9812 909 Life table of a hypothetical population FIGURE 5 00001 Total # indiv in survivorship fecundity next time period Current #...
Question 1 Most cultures recognize the difference between prescribed medications and over-the-counter medications including herbs. True...
Question 1 Most cultures recognize the difference between prescribed medications and over-the-counter medications including herbs. True False Question 2 Where is the most reliable location to assess for petechiae in a person with darkly pigmented skin? Soles of the feet Upper chest and shoulders Lining of the mouth Palms of the hands Question 3 options: Is the following statement true or false? Subjective data refers to things that people say or relate about themselves, whereas objective data result from the...
1. When it comes to financial matters, the views of Aristotle can be stated as:...
1. When it comes to financial matters, the views of Aristotle can be stated as: a. usury is nature’s way of helping each other. b. the fact that money is barren makes it the ideal medium of exchange. c. charging interest is immoral because money is not productive. d. when you lend money, it grows more money. e. interest is too high if it can’t be paid back. 2. Since 2008, when the monetary base was about $800 billion,...
Question 3 2 pts Select all statements that are true with respect to steady and non steady-state diffusion. Self-diffusion of Fe is slower than diffusion of Cin Fe In non steady-state diffusion, diffusion flux into the system is equal to diffusion flux out. Self-diffusion can be monitored by use of radioactive isotopes High density materials will have faster diffusion than low density materials Concentration gradient is a driving force for diffusion
The steady-state diffusion flux through a metal plate is 5.4 x 10 at a temperature of 727°C and when the I mis concentration gradient is - 3 : Calculate the diffusion flux (same units as flux provided) at 1027°C for the same . Y concentration gradient and assuming an activation energy for diffusion of 125,000 J/mol. Enter your answer in scientific notation with 2 decimal places e.g. 1.2E-3
Diffusion Mechanisms - Nonsteady State Diffusion - Copy Learning Goal: To learn how the diffusion rate changes in dynamic conditions where the diffusion profile changes with time, and how in some cases it can be modeled easily In steady stadision, the concentration Cis a function only of position (not of time). When usion is nonsteady Cis a function of position and time, Oix Nonsteady state diffusion in one direction can be modeled using Fick's Second Law -D where is the...
1-7
thanks in advance
1 - Answer the following questions on the attached answer sheet: 1. BCC materials have the following family of slip systems: a. (111)<110> b. (110) <111> C. (211}<110> d. (0001)<1120> 2- Slip is most likely to occur on: a. The most densely packed plane along the least densely packed direction b. The most densely packed plane along the most densely packed direction C. The least densely packed plane along the most densely packed direction d. The...
QUESTION 1 The binary gaseous diffusion coefficients of air in methyl chloride CH;Cl at 298 K and 1 atm have been determined. A simple diffusion cell was used, in which concentration changes of the diffusing gas were followed by infrared spectro- photometre. The diffusion coefficient DAB value measured is 1.434 x10 m2/s a) State two assumption of kinetic gas theory (4 Marks) b) Determine the diffusion coefficient, DAB using Chapman Enskog calculated by a kinetic theory equation using the Lennard-Jones...
Question 1 (1 point) Which of the following statements about acids is NOT true? a) An acid increases the concentration of hydronium in solution. b) An acid is a proton donor. c) An example of an acid is HBr. d) An acid increases the concentration of protons in solution. e) An acid increases the concentration of hydroxide in solution. Question 2 (1 point) Which of the following changes in blood pH would you expect to observe in a hyperventilating patient,...
please help
Question 23 (1 point) Which observation is NOT explained by the intermediate disturbance hypothesis In the interior of an old forest a low number of K-type species dominate the community Species evenness is larger when disturbances are extremely frequent Species richness increases immediately after a disturbance such as a fire, but may decrease later In beach dune environments, a low number of r-type species dominate the community Question 24 (1 point) Some birds follow moving swarms of army...
can
anyone help me with these questions for ecology. thanks!
the 1000 IN-dN/dt A Population size the dN/dt = IN (K-N)/K y = 164.170.1387x bio Number of individuals 10 3512 909 95209 Time FIGURE 1 29 3 10 Time years FIGURE 4 Population densities of individual species 000.01 Environmental gradient- (such as temperature or moisture) 09 FIGURE 2 9812 909 Life table of a hypothetical population FIGURE 5 00001 Total # indiv in survivorship fecundity next time period Current #...
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