LIFESCI 2 Chapter Notes - Chapter 2.4: Heat Capacity, Surface Tension, Solution
2 Oct 2016
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Hydrogen bonds gives water several unusual, life-sustaining properties. If ice were denser than liquid, water would freeze from the bottom up, killing aquatic life. C: heat of vaporization for water=586 cal/g i. ii. Amount of heat required to cause water to transition from liquid to gas. Heat loss from vaporization of sweat keeps body temp from increasing when environment is too hot. D. the polarity of water molecules in the hydrogen bond lattice contributes to. Polar and nonpolar environments in and around cells: competing polar or charged regions can disturb the water lattice, lattice excludes nonpolar substances (like oil, distinct polar and nonpolar environments are critical to org. In this way, water acts as a solvent i. Ex: water breaks table salt into individual na+ and cl- ions due to hydration layer around these ions in solution: when water evaporates, na and cl are able to reassociate and become table salt once more.
