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6 Water and Heat - Note taker needed for SWS 2007 See me...

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Note taker needed for SWS 2007 See me after class if interested
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Unusual Properties of Water
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+ + _ Polarity + Electric Dipole
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- + Orientation Bond - + Opposite charges attract each other (hydrogen bond) http://games.mochiads.com/c/g/polarityfreak/polarityfreak-11-Mochi-Sec.swf
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Hydrogen Bonding in Water Hydrogen Bonding Gives Water Unusual Properties
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Extensive Hydrogen Bonding Allows Water to Exist as a Liquid at Normal Temperatures And across a wide range in temperatures Examples High Boiling and Freezing Points Wide Liquid Range (100 o C) Other Unusual Thermal Properties Unusual Density
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Density M V grams cm 3 Low mass and high volume = low density High mass and low volume = high density
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Most substances are denser in their solid state than in their liquid state (the solid will sink in the liquid) Density Liquid to Solid?
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In liquid water each water molecule is bonded On average to 3 other water molecules. In solid water , each water molecule is bonded to 4 other water molecules and the bonds are farther apart.
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