The Special Properties of Waer Windward Community College水的特殊性质，迎风社区学院.pptVIP

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2018-06-19 发布于福建
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The Special Properties of Waer Windward Community College水的特殊性质，迎风社区学院.ppt

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The Special Properties of Waer Windward Community College水的特殊性质，迎风社区学院

Water Earth the Water Planet Earth the Water Planet Special Properties of Water Universal Solvent Transparency Three Physical Phases Density and Temperature High Specific Heat High Heat of Vaporization Low Compressibility “Stickiness” of Water Molecules Viscosity Polarity of Water Molecules Hydrogen Bonding Between Water Molecules Hydrogen Bonding Between Different Molecules NaCl (sodium chloride)Dissolving Into Water NaCl Dissolving Into Water NaCl Dissolving Into Water Protein Dissolving Into Water Solubility of Solids In general, the solubility of solids increases with increases in temperature. Solubility of Gases In general, the solubility of gases decrease with increases in temperature. Importance to Living Things Transparency Electromagnetic Radiation Electromagnetic Radiation Light Intensity and Depth in the Ocean Spectral Characteristics of Light with Depth Importance to Living Things Three Phases of Water Three Phases of Water Ice vs Liquid Water Melting and Boiling Temperatures of Water Colligative Properties Dissolved solids increase the boiling point and decrease the freezing point. Importance to Living Things Density and Temperature Above 4°C the density of liquid water decreases as the temperature increases. As the temperature is decreased from 4°C to 0°C, the density decreases. Water exhibits a density maximum of 1.0 grams/milliliter (g/mL) at 4°C. Ice is less dense than water. Density Behavior of Water Specific Gravity Importance to Living Things Ice Floats! High Specific Heat Importance to Living Things High Heat of Vaporization Importance to Living Things Low Compressibility Importance to Living Things Low Compressibility “Stickiness” of Water Molecules Cohesion Adhesion Cohesion + Adhesion Importance to Living Things Surface Tension Importance to Living Things Viscosity Colloids and Suspensions Importance to Living Things Decomposition of Water Definition of pH Acids Bases pH Scale pH Scale Buffers Importance to Living Things Water Water exists