Water_Ch3

Water_Ch3 - Water Ch 3 Two major concepts Physical...

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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
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Thermodynamics Energy Potential energy (concentration, structure) Kinetic energy Heat Temperature Calories: little cal, big cal (cal, kcal, Cal) Specific heat Relation to reactions
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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. 1.0
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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. 1.0
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Water is an effective solvent because it so readily forms hydrogen bonds with charged and polar covalent molecules. For example, when a crystal of salt (NaCl) is
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Water_Ch3 - Water Ch 3 Two major concepts Physical...

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