fractional_distillation

fractional_distillation - FRACTIONAL DISTILLATION ORG I LAB...

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Unformatted text preview: FRACTIONAL DISTILLATION ORG I LAB Dr. W. J. KELLY THE BOILING POINT THE BOILING POINT The Boiling Point is the temperature at which internal vapor pressure of the liquid is equal to the pressure exerted by its surroundings If the liquid is open to the atmosphere, the boiling point is the temperature at which the internal vapor pressure of the liquid becomes equal to atmospheric pressure (~760 mm Hg). The internal vapor pressure of a pure liquid rises steadily as the temperature is increased until the boiling point is reached. P e -C/T The temperature remains constant throughout the boiling process of a pure liquid. At the boiling point, the liquid and vapor are in equilibrium ...if the composition of each phase remains constant, the temperature will remain constant In a Distillation Process a liquid is heated to its boiling point, the vapors expand out of the container and are then cooled below the boiling point temperature, where they recondense as a liquid THE TEMP/TIME RELATIONSHIP THE TEMP/TIME RELATIONSHIP A thermometer placed in the vapor of a boiling pure liquid registers the liquids boiling point. The temperature remains constant throughout the boiling process of a pure liquid. pure liquid. At the boiling point, the liquid and vapor are in equilibrium ...if the composition of each phase remains constant, the temperature will remain constant The temperature of a liquid mixture AB, where BP A <BP B will rise steadily over time. The composition of the liquid and vapor in equilibrium changes constantly over time. constantly over time....
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fractional_distillation - FRACTIONAL DISTILLATION ORG I LAB...

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