5 The Water Molecule 5

5 The Water Molecule 5 - Magnets and Polarity N Magnetic...

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Unformatted text preview: Magnets and Polarity N Magnetic Dipole S Polarity N S N S Opposite Poles Attract Polarity Same Poles Repel N S N S Polarity N N S S http://games.mochiads.com/c/g/polarityfreak/polarityfreak-11-Mochi-Sec.swf Polarity Slight positive charge + Slight negative charge Electric Dipole Orientation Bond (hydrogen bond) + + - - Opposite charges attract each other Hydrogen Bonding in Water Hydrogen Bonding Gives Water Unusual Stability Example Extensive Hydrogen Bonding Allows Water to Exist as a Liquid at Normal Temperatures Boiling Point and Freezing Point Water (H2O) Hydrogen Sulfide (H S) 2 F.P 0oC -84 C o B.P 100oC -60 C o liquid range 100oC 24 C o Hydrogen Selenide (H Se) 2 -64 C o -42 C o 22 C o Hydrogen Telluride (H Te) 2 -49 C o 2C o 47 C o High Boiling and Freezing Points Other Unusual Thermal Properties Unusual Density Summary Hydrogen and oxygen share electrons to form water The water molecule is electrically unbalanced Oxygen is electron greedy; it is highly electronegative Oxygen draws electrons toward itself and away from hydrogen This creates a slight negative charge near oxygen There is also a slight positive charge near hydrogen The result is a molecule that is polar (+ and – poles) This polarity accounts for electrostatic bonding between water molecules Bonding between water molecules gives water unusual stability. No Class Friday ...
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5 The Water Molecule 5 - Magnets and Polarity N Magnetic...

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