Lecture Four

Lecture Four - Lecture Four 9/1/10 WATER:...

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Lecture Four 9/1/10 WATER : Cohesive -molecules stick to each other. (due to hydrogen bonds) can be seen in surface tension. Adhesive - molecules stick to other things. (due to polarity) High specific heat . Large organisms that have large amounts of water are thermally much more stable than organisms with smaller amounts of water. (an elephant compared to a mouse). High heat of vaporization . It takes a lot of energy for molecules to break hydrogen bonds to go from a liquid state to a gas state. Lower density as solid compared to liquid . In a solid state, the molecules are like crystal- ice becomes less dense than liquid water. Ice is a great insulator. (in the winter, ponds and lakes freeze on top, and keep the body of water beneath them livable for the organisms below). Freezing is so dangerous because the molecules expand, and the cells will explode and or be ripped apart. Solvent for polar molecules
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Lecture Four - Lecture Four 9/1/10 WATER:...

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