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Chem Today: States of Matter & Intermolecular Forces

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Presentation on theme: "Chem Today: States of Matter & Intermolecular Forces"— Presentation transcript:

1 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

2 Intermolecular Forces
Forces of attraction between molecules (dotted lines represents attraction between water molecules)

3 Butane Demo

4 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

5 VAPOR ATMOSPHERIC Boiling point of a liquid: vapor pressure = atmospheric pressure

6 Syringe Demo

7 : VAPOR PRESSURE = ATMOSPHERIC PRESSURE =NORMAL BOILING POINT
- - - STANDARD ATMOSPHERIC PRESSURE also = 1 atm : VAPOR PRESSURE = ATMOSPHERIC PRESSURE =NORMAL BOILING POINT

8 1. What happens to the vapor pressure of a substance when the temperature increases? IT INCREASES


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