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Water Most abundant molecule in living things Polar molecule Increases ability to form H bonds with other molecules Cohesion Attraction of water to water.

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Presentation on theme: "Water Most abundant molecule in living things Polar molecule Increases ability to form H bonds with other molecules Cohesion Attraction of water to water."— Presentation transcript:

1 Water Most abundant molecule in living things Polar molecule Increases ability to form H bonds with other molecules Cohesion Attraction of water to water Adhesion Attraction of water to other substances Surface tension Capillary action Hydrophyllic = water lovingHydrophobic = water fearing

2 Water specific heat High specific heat Amount of energy (as heat measured in calories) required to raise 1 gram of a substance 1°C Specific heat for water is 1 calorie 1kcal = 1000 calories 1 joule = cal 1 calorie = J Heat of vaporization = 580 calories = amount required to change 1 gram of water from liquid to vapor and visa versa Evaporative cooling Heat of fusion = 80 calories = amount required to change 1 gram water from solid to liquid and visa versa Water densest at 4°CWater at 0°C floats (ice)

3 Water solvent of life Solute = substance that is dissolved in a fluid Solvent = fluid a solute is dissolved in Solutes are hydrophyllic or hydrophobic A solution is aqueous if water is the solvent Molarity measures concentration of solute in aqueous solutions 1 mole = molecular weight of a substance in grams 1 molar solution = 1 mole of a substance plus water to equal 1 liter


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