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6-OcFA11-ChemWEB - Chemical and Physical Properties of...

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Chemical and Physical Properties of Water & Seawater H 2 O: An amazing molecule with peculiar properties making life on this planet possible Will Discuss Peculiar properties of Water: Solvent Properties Thermal Properties (heat capacity, Latent heat) Temp.-Density Behavior Atom – smallest particle of an element that has all the properties of that element. Each atom has a distinct # of protons = atomic number Molecule – a group of bonded atoms O-H bonding is COVALENT (sharing of electrons) Water molecule is POLAR (uneven charge distribution) Liquid water molecules are hydrogen bonded (attracted) to eachother Dissolved solids = dissolved ions - Ion: an atom that has gained or lost one or more electrons (has an electronic charge) Anion = negatively charged ion Cation = positively charged ion Water has great power to dissolve ions (vs. other liquids) because of its polarity
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Water: Thermal Properties Heat = Energy produced by vibrations of atoms and molecules = total energy of the molecules Temperature = average energy of the molecules Heat Capacity : Amount of E needed to raise T Liquid Water = 1 calorie/1 o C Highest of almost any other substance
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