9_water_properties - PropertiesofWater GS222...

Info icon This preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Properties of Water GS222 Lecture 9 – total lecture length 60-65 minutes
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Overview - this lecture Molecular properties of water (hydrogen bonding, polarity) Consequences for oceanography and climate. Why is the ocean salty? Inputs and outputs. Residence time and principle of constant proportions
Image of page 2
Properties of H 2 0 3 key properties 1) polarity - O H H + Covalent bonding (sharing of electrons)  between oxygen and hydrogen Molecule is positively charged on one end,  negatively charged on the other (i.e. polar)
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Properties of H 2 0 3 key properties 2)  hydrogen bonding O H H + Weak bonds (no electron sharing) Due to attraction of the positive and negative  ends of H 2 O - O H H O H H - - + + + + + hydrogen bond covalent bond
Image of page 4
Properties of H 2 0 3 key properties 3) present in all 3 phases in earth’s temperature  range (ice, liquid, and vapor)
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Consequences Water has a very high heat capacity large quantities of heat required to raise  temperature (~4 J to raise 1 g by 1 deg C) heat absorbed by H bonds moderates coastal temperatures Water has a very high latent heat of vaporization massive quantities of heat required to vaporize  liquid water heat absorbed by H bonds key factor in atmospheric heat transport
Image of page 6
Water phases vs. heat energy 1 calorie = 4.2 Joules
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Consequences Water is an extremely good solvent,  aka  “the universal solvent” solvent: liquid that dissolves a  solid an effective solvent due to polarity e.g. NaCl (table salt) dissolves  because:                                     1)  Na +  ion is attracted to negative  end of H 2 0, and         2) Cl -   attracted to positive end of H 2
Image of page 8
Consequences Water attacks and surrounds or ‘hydrates’ ions Animation: http://chemlinks.beloit.edu/Water/moviepages/Comp3salt.htm
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Consequences Water is an extremely good solvent, aka  “the  universal solvent” once surrounded by H 2 O molecules (i.e.  hydrated), dissolved ions too far apart to attract  one another water is merciless predator of salts, a piranha! - O H H +
Image of page 10
Properties of water summary Property Special Characteristic Importance Heat capacity Higher than that of any solid or liquid other than ammonia.
Image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern