FFSeawater_OM_SFSU

FFSeawater_OM_SFSU - SOMETHINGOLD SOMETHINGNEW...

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    SOMETHING OLD SOMETHING NEW SOMETHING BORROWED SOMETHING BLUE
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    WATER
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    Polar Water Molecule (Polar Bear) O H H + _
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    Polar Water Molecule (Polar Bear) O H H + _
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    Water’s special properties How does water’s unique shape affect its  behavior?
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    Water’s special properties •Polarity Creates Cohesion & Adhesion •Great Solvent (“Universal Solvent”) •All 3 Phases at surface of Earth •High Heat Capacity •Unique Density Curve •High Latent Heat •Good Sound Transmission •Readily Absorbs Light Energy •Tasteless and Odorless to Humans
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    For heat capacity and density, freshwater is the  standard against which other materials are  measured: Specific Heat (H 2 O)  = 1 calorie/1gram/1 ° C (aka Heat capacity = amount of heat required  to raise 1 gram of a substance 1 ° C) If the specific heat of a substance is 0.25, then it  takes ¼ the amount of heat to raise its  temperature the same amount as an equal  weight of freshwater.
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    Think about the Weather for a Minute Think about Water’s role in That   How does  water’s high specific heat  affect  Earth’s  weather ? Does is tend to moderate the climate? Or, does it make weather more severe?
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    Water and Weather   How does  water’s high specific heat  affect Earth’s  weather ? It can moderate the temperature of land next to  the water; it redistributes Earth’s heat because it  stores a lot of heat and moves that heat around  through evaporation and precipitation and  moving air (wind) or through moving water  (currents in the ocean). It can also cause  hurricanes by releasing enormous quantities of  heat in a short period of time.
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    Water and Weather
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    Specific heat (or heat capacity) of water: 1 calorie/gram  ° C      Specific heat (or heat capacity) of water vapor: 0.44 cal/gram  ° C Specific heat (or heat capacity) of ice: 0.5 calorie/gram  ° C Latent heat : heat used to change the state of a substance (like from solid to liquid). Heat is used  to break bonds, not raise temp. Specific heat (or heat capacity)  = heat used to raise the temperature of a substance (heat you  can sense). 
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    Temp change State of water Heat change Total START: 1 gram of solid ice at -10 ° C END: 1 gram of water vapor at 120 ° C Specific heat (or heat capacity) of water:  1 calorie/gram  ° C      Specific heat (or heat capacity) of water vapor:  0.44 cal/gram  ° C Specific heat (or heat capacity) of ice:  0.5 calorie/gram  ° C Latent heat of melting:  80 calorie/gram Latent heat of vaporization:  540 calorie/gram
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    Temp change State of water Heat change -10 °  to 0 ° C Solid 0 ° C Solid   Liquid 0 °  to 100 ° C
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This note was uploaded on 09/30/2011 for the course OCN 100 taught by Professor Horrigan during the Spring '08 term at S.F. State.

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FFSeawater_OM_SFSU - SOMETHINGOLD SOMETHINGNEW...

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