A02%20-%20Water_Ch3

A02%20-%20Water_Ch3 - Water. Ch. 3. Two major concepts:...

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1 Water. Ch. 3. Two major concepts: Physical properties: Polarity, H bonds Surface tension (cohesion) Thermodynamics heat of vaporization specific heat: calorie Ice floats Solvent; concentration Modulate atmospheric conditions Thermodynamics • Energy – Potential energy (concentration, structure) – Kinetic energy • Heat • Temperature • Calories: little cal, big cal (cal, kcal, Cal) • Specific heat • Relation to reactions Many properties of water depend upon hydrogen bonds The slightly negative regions of one molecule are attracted to the slightly positive regions of nearby molecules, forming a hydrogen bond. Each water molecule can form hydrogen bonds with up to four neighbors. When water reaches 0 o C, water becomes locked into a crystalline lattice with each molecule bonded to to the maximum of four partners. Ice is about 10% less dense than water at 4 o C. The tensile strength of water is due to: 1. Salt bridges 2. Covalent bonds 3. Hydrogen bonds 4. High molecular weight
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This note was uploaded on 02/28/2008 for the course BISC 220L taught by Professor Herrera,mcclure during the Fall '07 term at USC.

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A02%20-%20Water_Ch3 - Water. Ch. 3. Two major concepts:...

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