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Published byAriel Ray Modified over 5 years ago
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Chem Today: States of Matter & Intermolecular Forces
Take out your laptops Go to: bit.ly/MatterPhet. Click on “States”. Complete the front side of today’s handout using the simulation
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Intermolecular Forces
Forces of attraction between molecules (dotted lines represents attraction between water molecules)
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Butane Demo
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Pressure: Atmospheric Pressure=pressure exerted by the air above a surface Vapor Pressure=pressure exerted by the molecules at the surface of the liquid; (they want to escape to the gas phase) VAPOR ATMOSPHERIC
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VAPOR ATMOSPHERIC Boiling point of a liquid: vapor pressure = atmospheric pressure
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Syringe Demo
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: VAPOR PRESSURE = ATMOSPHERIC PRESSURE =NORMAL BOILING POINT
- - - STANDARD ATMOSPHERIC PRESSURE also = 1 atm : VAPOR PRESSURE = ATMOSPHERIC PRESSURE =NORMAL BOILING POINT
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1. What happens to the vapor pressure of a substance when the temperature increases? IT INCREASES
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