distillation - Separation of Toluene and Hexane by...

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Chem 341 - Distillation 1 Separation of Toluene and Hexane by Distillation and Gas Chromatography Important Concepts • Theory of Distillation • Distillation Setup/Equipment • Raoult’s Law • Theoretical Plates • Fractional vs. Simple Distillation • Technique of Gas Chromatography Part 1, p. 129: Simple distillation. Part 2, p. 129: Fractional distillation (use same procedure as simple). Part 3, p. 202: Separation by gas chromatography
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Chem 341 - Distillation 2 History of Distillation Photo Source: † - Wikipidia alembic Oil ReFneries Jabi ibn Hayyan [aka Geber] (721-815) Born in Persia or Arab part of Middle East. Alchemist Evidence of distilled spirits in Babylonia (ca 4000 BC)
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Chem 341 - Distillation 3 Distillation Theory Vapor Pressure : a measure of the ease with which a molecule escapes from the liquid phase into the gas phase. High vapor pressure more molecules in the gas phase Volatile compound Note: Vapor pressure increases with temperature! Dalton’s Law : the total pressure is equal to the partial pressures of each component in the gas phase [P tot = P x + P y + … ]. N x = nX nX + nY + nZ + ⋅⋅⋅ Raoult’s Law : the vapor pressure ( P x ) depends on the mole fraction ( N x ) of each component [ ], where is the vapor pressure of pure X at a given temperature. P
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This note was uploaded on 04/04/2011 for the course CHEM 341 taught by Professor Staff during the Fall '08 term at SIU Carbondale.

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distillation - Separation of Toluene and Hexane by...

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