A 10.0 cm in diameter solid sphere contains a uniform concentration of urea of 12 mol/m². The diffusivity of urea in the

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A 10.0 cm in diameter solid sphere contains a uniform concentration of urea of 12 mol/m². The diffusivity of urea in the

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A 10 0 Cm In Diameter Solid Sphere Contains A Uniform Concentration Of Urea Of 12 Mol M The Diffusivity Of Urea In The 1
A 10 0 Cm In Diameter Solid Sphere Contains A Uniform Concentration Of Urea Of 12 Mol M The Diffusivity Of Urea In The 1 (406.87 KiB) Viewed 30 times
A 10.0 cm in diameter solid sphere contains a uniform concentration of urea of 12 mol/m². The diffusivity of urea in the solid sphere is 2x10-8 m2/s. The sphere is suddenly immersed in a large amount of pure water. If the distribution coefficient is 2 and the mass transfer coefficient (k) is 2x10-7m/s, answer the following: a) What is the rate of mass transfer from the sphere surface to the fluid at the given conditions (time=0)? b) What is the time needed (in hours) for the concentration of urea at the center of the sphere to drop to 2 mol/m??
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