112009a

# 112009a - What will happen to the vapor pressure of a...

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What will happen to the vapor pressure of a liquid if a solid is dissolved in it? I nc re ase De cr ea s e Re mai n the same 50% 11% 38% 1. Increase 2. Decrease 3. Remain the same

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Vapor Pressures of Solutions
Vapor Pressures of Solutions

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Vapor Pressures of Solutions: Raoult’s Law Francois-Marie Raoult: French Chemist 1830-1901
Vapor Pressures of Solutions y The vapor pressure of a solution containing 53.6 g glycerin (C 3 H 8 O 3 ) in 133.7 g ethanol (C 2 H 5 OH) is 113 torr at 40 o C. Calculate the vapor pressure of pure ethanol at 40 o C assuming that glycerin is a nonvolatile, nonelectrolyte solute in ethanol.

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y Pentane (C 5 H 12 ) and hexane (C 6 H 14 ) form an ideal solution. At 25 o C the vapor pressures of pentane and hexane are 511 and 150. torr, respectively. A solution is prepared by mixing 25 mL pentane (density = 0.63 g/mL) with 45 mL hexane (density = 0.66 g/mL) y What is the vapor pressure of the resulting solution? y
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## This note was uploaded on 10/23/2010 for the course CHEM 105A taught by Professor Bau during the Fall '04 term at USC.

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112009a - What will happen to the vapor pressure of a...

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