Lecture21 - ChE 210: Meeting 21 March 2, 2011 Outline...

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Unformatted text preview: ChE 210: Meeting 21 March 2, 2011 Outline (F&R Section 6.5-6.8) Homework Due Friday 03/04/2011 - Colligative Solution Properties 6.8, 6.18, 6.23, 6.35, 6.37 - Equilibrium between Two Liquid Phases - Adsorption on Solid Surfaces Colligative Solution Properties Colligative properties depend on the concentration of solute in a solvent, but not the chemical composition of the solute or solvent Colligative properties: - Vapor pressure - Boiling point - Freezing point Example (Vapor Pressure) 1/5 ChE 210: Meeting 21 March 2, 2011 Example (Boiling Point) 'l Eguilibrium between Two Liguid Phases lmmiscible liquid phases contain a negligible amount of the other component Partially miscible liquid phases contain low concentrations of the other component If a third substance is added to a two-phase liquid mixture it distributes according to its relative solubility in each phase mass fraction solute in solvent 1 distribution coefficient = . _ mass fraction solute In solvent 2 2/5 ChE 210: Meeting 21 March 2, 2011 Example Problem 6.89a Extraction Unit L. mci = 100.0 kg/h xOA,ci = 0.0500 xclci = 0.9500 mC,co = mOA,co = 3/5 ...
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Lecture21 - ChE 210: Meeting 21 March 2, 2011 Outline...

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