Lab Experiment3 - Lab Experiment 3 Distillation and Fractional Distillation Shelley Hobbs Information Vapor pressure increases as heat increases

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Lab Experiment # 3 Distillation and Fractional Distillation Shelley Hobbs 9/4/08 Information: Vapor pressure increases as heat increases. The higher volatile the substance the higher the vapor pressure is. Vapor pressure is pressure produced by the pressure produced by the vapor of that liquid at a given temperature. When vapor pressure is equal to the applied pressure then boiling occurs. A liquid can be made to boil by 1) increasing vapor pressure ( applying heat) or 2) Decreasing applied pressure ( applying a vacuum). Raoul’s Law is the vapor pressure of a mixture is the combined pressure of the vapor pressure of all the liquids in the mixture. Vp total = XaVpa +XbYpb ……. Xa= moles of a/moles of everything Simple distillation is used for the separation of nonvolatile solids from liquids and for liquids that have a boiling point difference of at least 70 o C. Fractional Distillation is used for separating mixtures of liquids with boiing point differences less than 60 o . Repeating distillation over and over again each time you
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This note was uploaded on 12/02/2010 for the course CHEM 10293 taught by Professor R.ghana during the Spring '10 term at Palo Alto College.

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Lab Experiment3 - Lab Experiment 3 Distillation and Fractional Distillation Shelley Hobbs Information Vapor pressure increases as heat increases

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