Questions and Answers of Chemical Biochemical And Engineering

Redo Problem 10.3-12 using Aspen Plus.Problem 10.3-12The following vapor-liquid equilibrium data are available for the system carbon dioxide (1) + isobutane (2) at 273.15 K.a. Find the value of the
Redo Problem 10.3-8 using Aspen Plus.Problem 10.3-8Vapor-liquid equilibria in petroleum technology are usually expressed in terms of K factors Ki = yi/xi, where yi and xi are the mole fractions of
Redo Problem 10.3-9 using Aspen Plus.Problem 10.3-9In a petroleum refinery an equimolar stream containing propane and n-butane is fed to a flash separator operating at 40°C. Determine the pressure
a. The osmotic coefficient of a solvent ∅S is defined by the relationwhere ∅S → 1 as xS → 1. Develop an expression relating the activity coefficient γS to the osmotic coefficient ∅S.b.
Show that the condition for equilibrium in a closed isothermal system, one part of which is maintained at PI and the remainder at PII, is that the function G′ = U − TS + PI VI + PIIVII be a
A mixture of methane (40 mol %), propane (20 mol %) and n-hexane (40 mol %) at 70°C and 10 bar is adiabatically flashed to 1 bar. Determine the temperature of streams exiting the valve, the relative
Bruno and coworkers [Int. J. Thermophys., 7, 1033 (1986)] describe an apparatus that contains a palladium-silver membrane that is permeable to hydrogen but not other gases. In their experiments after
Derive a form of the Gibbs phase rule that applies to osmotic equilibrium.
A rough rule of thumb in polymer solution theory is that a 4 molar aqueous polymer solution will have an osmotic pressure of approximately 100 bar. Is this rule of thumb in approximate agreement with
Joe Udel lives on the second floor of a house that is adjacent to a well of pure water, but city water comes out of his indoor plumbing. He would rather have pure well water. So he has developed the
The following data have been reported for the osmotic pressure of α-chymotrypsin in water at pH = 8.0 in an 0.01 M potassium sulfate solution at 25°C.Use these data to determine the molecular
Derive the form of the Gibbs phase rule that applies to a multicomponent system in osmotic equilibrium in which all but two of the components can pass through the membrane separating the two
The following data have been obtained by graduate student Ron Maurer for the solubility of a crystalline substance (which happens to be a protein, but that is irrelevant) that ionizes on dissolution
Coca Cola has approximately 39 grams of fructose in 355 ml. Since the other (secret) ingredients in Coca Cola are present in small quantities, they can be neglected. Neglect the carbon dioxide in the
An interesting question in marine biology is how some organisms can survive the pressures encountered in the deep ocean. A possible explanation is that these organisms contain higher concentrations
A new membrane premeable only to water is to be used for purifying water containing a pesticide. Your employer requests that you setup a demonstration consisting of an insulated rigid tank at 2°C
The osmotic pressure for a small molecule in aqueous solution has been found to be given by the following expression where 1 is the solvent and 2 is the small; molecule solute. Obtain expressions
The more environmentally friendly refrigerants are made of hydrogen-containing compounds that have a short environmental lifetime. However, these compounds are also combustible. Therefore, one

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