BIOL 1020 Lecture Notes - Lecture 2: Central Min, Surface Tension, Solution
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BIOL 1020 Full Course Notes
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Chapter 3: polarity allows water molecules to form hydrogen bonds with each other. Versatility as a solvent: cohesion - attraction between molecules of the same substance, adhesion - attraction between molecules of the different substance. *cohesion of water molecules along a surface produces surface tension. Water helps maintain a stable temperature: high speci c heat of water > temp. stability. Speci c heat: energy to raise the temp. of 1 gram of something by 1*c. Hydrogen bonds make water speci c heat high: water can absorb or release a large amount of heat with only a slight change in its own temperature. Evaporative cooling: heat of vaporization - energy to move 1 gram from liquid to gas, high heat of vaporization water helps cool the ecosphere and biological organisms. Water forms an unusual solid: ice: freezes at 0 degrees celsius - ice, less dense than water - molecules spread apart, ice oats in liquid water.
