2. Compute the thermal neutron diffusion coefficient and the extrapolation length for water and carbon.
3) Calculate the thermal diffusion coefficient and diffusion length of heavy water in a CANDU reactor. Use Google to determine the moderator temperature/pressure/density in a CANDU reactor.
Diffusion Example 2: Which diffusion ean? The initial carbon concentration in an iron bar is 0.20%. The surface concentration of the bar is maintained at 0.40% in a CO/CO2 environment. The bar is maintained at 1273K where the diffusion coefficient of carbon in iron is 3.0x107 cm2/s. How long will it take to obtain a carbon concentration of 0.24% at a depth of 0.01 cm beneath the surface of the iron bar?
Consider the equimolar mixture of carbon monoxide and hydrogen gas. The binary diffusion coefficient for the mixture at 573.15 K is 2.423 cm/s. The binary diffusion coefficient for the same mixture at 673.15 K is 3.196 cm²/s. 1st attempt W See Periodic Table D See Hint What is the ratio of root-mean-square speed rates for carbon monoxide in hydrogen based off of this experimental data? Hrms at 673.15K urms at 573.15 K (Assume there is no change in concentration with...
An apparatus has been created to measure the diffusion coefficient of carbon through iron. It is composed of a chamber filled with a carbon rich gas. A 0.5 m long iron pipe passes through the chamber. A gas with very little carbon flows through the pipe and a detector on the exit of the pipe counts the total amount of carbon atoms flowing out of the pipe with time, giving J = 0.032 mol/day. The outer and inner diameter of...
Estimate the diffusion coefficient for methyl phenyl sulfide in water at 25 degrees Celcius.
please, solve by explaning :)
Consider an Am-Be neutron source placed inside a spherical water tank with a radius of R The source (assuming point source) emits S neutrons per second. For this experimental setup, students should (a) State energy of the neutrons released from the source. (b) Write time-dependent two-group neutron diffusion equation for the source. (c) Give boundary conditions necessary to solve the equations you obtained in (b). (d) Draw fast and thermal fluxes as a function of...
15. What is the diffusion coefficient (m/s) in water at 25°C of a bovine pancreas ribonuclease (an enzyme that digests RNA) whose molecular weight is 1.369x109 and which is spherical?, Assuming the protein is an unhydrated sphere and its density is 1.414 g/cm'. The viscosity of water is 10- Pas. [Hint: Calculate the radius of the protein and use the Einstein relation to estimate the diffusion coefficient.] (10 pts)
4. In a spherical thermal reactor of radius R, it is found that the angular neutron flux can be roughly described by 9 (,E,Ħ) – esp ( ) sin(qr/) Compute the total number of neutrons in the reactor. The final result should be: N=8 m poR² (akT) 3/2
a) What is the diffusion coefficient (DHCi) at 99 °C for a very dilute solution of hydrogen chloride, HC, in water? The ionic diffusion coefficients in water at 25°C are 9.31 X 105 cm2/s for H and 2.03 X 105 cm2/s for Cl. Start this problem by calculating the ionic |diffusion coefficients at 99 °C from those given at 25 °C assuming the viscosity of water at 25 °C and 99 °C is the same. Assume there is no current...
Determine the diffusion coefficient for glycerine in H 2 O using the following observations: glycerine diffuses along a horizontal, water-filled column that has a cross-sectional area of 2.0 cm 2 . The density step across ∆r /l is 3.0 × 10 −2 kg/m 4 and the steady-state diffusion rate is 5.7 × 10 −15 kg/s.