311C F07 L4OL - Water Outline: Water: structure Emergent...

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Water Outline: Water: structure Emergent properties of water Dissociation of water molecules and pH
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Water molecules are polar Polar covalent bonds
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Water molecules are polar The polarity of water molecules allows them to form hydrogen bonds with each other Responsible for the emergent properties Hydrogen bonds + H H + + δ δ δ δ
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Emergent Properties of Water Cohesion Moderates temperature Expands upon freezing The Solvent of Life
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Cohesion Binding together of like molecules Due to hydrogen bonding Water molecules resist coming apart from each other
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Cohesion Water transport in plants Water conducting cells
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Surface Tension Measure of how difficult it is to stretch or break the surface of a liquid
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Water Moderates Temperature Absorbs heat from warmer air and releases heat to cooler air Absorbs/releases large amount of heat with only a slight change in its own temperature Due to high specific heat Actual water molecules only slightly change their speed (kinetic energy/temp)
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Specific Heat The amount of heat that must be absorbed or lost for 1g of a substance to change its temperature by 1 o C 1 cal/g/ o C High specific heat due to hydrogen bonding Heat must be absorbed to break hydrogen bonds Heat is released when hydrogen bonds form
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This note was uploaded on 05/01/2008 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas.

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311C F07 L4OL - Water Outline: Water: structure Emergent...

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