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6 Water and Heat 2

# 6 Water and Heat 2 - M(mass V(volume Water High density Low...

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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?
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. Density For the same amount (mass) of water molecules, the volume occupied is greater for solid water compared to liquid water. Therefore, the density of solid water is less than the density of liquid water.

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Unformatted text preview: M (mass) V (volume) Water High density Low density More molecules In a given volume Fewer molecules In a given volume The density of pure water at 25 o C is 0.997 g/mL. The density of ice at 0 o C is 0.917 g/mL. http://www.youtube.com/watch?v=SVR7tfsjPO0&NR=1 Liquid Crystalline Ice Density Stable hydrogen bonds yield Fixed distances between molecules (same number of molecules occupy a larger volume) Hydrogen bonds Break and re-form Why is this important? Importance lakes Thermal Properties Heat and Temperature Change paper...
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6 Water and Heat 2 - M(mass V(volume Water High density Low...

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