BIO152H5 Chapter Notes - Chapter 3: Heat Capacity, Evaporative Cooler, Surface Tension

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Chapter 3: water & life. Tuesday, december 9, 2014. Water has a v shaped molecule, and it is polar. The properties of water arise from the hydrogen bonds between water molecules. 4 emergent properties of water: Cohesion: water molecules being held together by h- bonds. Cohesion is what allows water & nutrients to be transported (against gravity) in plants. Adhesion, also occurs when transporting water. Surface tension: measure of how difficult it is to stretch or break the surface of water. >> water has unusually high surface tension, due to the h- bonds. Temperature regulation by water. Water can absorb/release large amounts of heat with only slight change in its own temperature. Temperature: average kinetic energy of molecules, regardless of volume. A calorie is the amount of heat required to raise the temperature of 1 g of water by. A kilocalorie (1000 cal) is the amount of heat required to heat 1 kg of water by.

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