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Published byMark Hancock Modified over 9 years ago
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Test #3 – Phase Changes Table H and Boiling Point http://www.youtube.com/watch?v=quo-RjT1-fk
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Normal Boiling Point NBP is the temperature when the Vapor Pressure of the liquid = Standard Pressure Standard Pressure = 101.3 kPa or 1 atm kPa = kilopascals atm = atmosphere
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Changing Boiling Points Increasing the air pressure on a liquid increases its boiling point and vise versa Examples: Pressure Cookers Inc pressure, inc BP Baking at High Altitudes Dec pressure, dec BP
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Table H: Vapor Pressure of 4 Liquids 1. Notice axes 2. Note: Increasing temperature increases the vapor pressure 3. Table can be used to predict: NBP at standard pressure (see dotted line) BP at different pressures which liquid has strongest intermolecular attractive forces (it’s the one with the lowest vapor pressure at any temp)
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Table H – Vapor Pressure of 4 Liquids
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