SBEC Chemistry and Physics

39 Responses to “Chemistry 2-2-09 Intermolecular Forces”

1.   katherine penn Says:
   February 2nd, 2009 at 6:24 PM

   what is the chemistry behind lava lamps?

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2.   John E Says:
   February 2nd, 2009 at 6:24 PM

   When drawing dipole structures, which way does the arrow point?

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3.   cayleb paxton Says:
   February 2nd, 2009 at 9:41 PM

   john

   the arrow points towards the most electonegative element

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4.   jeeen yoon Says:
   February 2nd, 2009 at 10:49 PM

   who discovered London dispersion forces?

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5.   Nick Geeslin Says:
   February 3rd, 2009 at 6:35 AM

   jeeen:

   Fritz London discovered the london dispersion forces.

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6.   Nathaniel W. Says:
   February 3rd, 2009 at 12:20 PM

   Why does the paper clip float on water in the photo used in the lecture?

   That doesnt make much since to me. I thought it was dense and was supposed to sink.

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7.   Hannah Roberson Says:
   February 3rd, 2009 at 1:27 PM

   When drawing dipole structures how do you know what direction to make the arrow?

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8.   Shelby Lee Says:
   February 3rd, 2009 at 4:24 PM

   Hey Nathaniel,
   The paperclip was placed on the water so gently that it didn’t break through the hydrogen bond.

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9.   anna knecht Says:
   February 3rd, 2009 at 4:51 PM

   Hannah,

   You always draw the arrow pointing towards the most electronegative element.

   *If it helps, Flourine is the most electronegative element.

   Anna k

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10.   Molly Kate Says:
    February 3rd, 2009 at 6:00 PM

    How do you know which element is the most electronegative?

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    cathy dunn Reply:
    February 3rd, 2009 at 8:45 PM

    Molly Kate,
    electronegativity is lowest in the bottom left and highest in the top right of the periodic table.

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11.   Marissa Newton Says:
    February 3rd, 2009 at 9:38 PM

    How does the London Dispersion Force work?

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12.   Alan Baur Says:
    February 4th, 2009 at 1:39 PM

    Which intermolecular force is the strongest?

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13.   macy Says:
    February 4th, 2009 at 4:01 PM

    why can bugs walk on water but people cant

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14.   Mary Gates Says:
    February 4th, 2009 at 9:13 PM

    Macy-
    Bugs can walk on water because the hydrogen bonds are holding the water at the surface really a lot, so like the teensy weight of a bug doesn’t break it, but you know, you weigh just a tad more than a ladybug, so you would break those hydrogen bonds (Im so not saying that you’re fat, you’re tiny! )

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15.   Mika D. Says:
    February 4th, 2009 at 10:40 PM

    So water is held together by hydrogen bonds which are relatively weak so if you strengthened the bond somehow would it begin showing properties of metals and even be able to walk on? or would it not even be water at all anymore?

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16.   nikkie Says:
    February 5th, 2009 at 11:19 AM

    macy, bugs are not strong enough to break the hydrogen bonds when they walk across the water, but as soon as we step into water we break the hydrogen bonds because we are strong enough to break those bonds.

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17.   Allen Wade Says:
    February 5th, 2009 at 11:36 AM

    Do London Dispersion Forces affect Noble Gases?

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18.   Emma Says:
    February 5th, 2009 at 12:12 PM

    how can the bugs walk on the water??

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19.   Jordan James Says:
    February 5th, 2009 at 3:17 PM

    Allen wade. I don’t think so because like they have covalent bonds, right?

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20.   Kara Says:
    February 5th, 2009 at 6:10 PM

    okay so wohow can you tell the difference between polar and nonpolar?

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21.   josh hopkins Says:
    February 5th, 2009 at 6:12 PM

    Emma: bugs can walk on water becuse of hydrogen bonds. They are not strong enough to break these bonds…

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22.   cody surwic Says:
    February 5th, 2009 at 9:55 PM

    if hydrogen bonds are so strong then why cant we walk on water

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23.   elizabeth anderson Says:
    February 6th, 2009 at 1:28 AM

    cody:
    the reason why we cant walk on water is because we are stronger than the hydrogen bonds,so they break

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24.   audrey ford Says:
    February 6th, 2009 at 1:29 AM

    what are dipole-dipole forces?

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25.   ashley white Says:
    February 6th, 2009 at 1:30 AM

    what is an intermolecular force?

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26.   JD Tackett Says:
    February 6th, 2009 at 9:30 AM

    Kara:
    to tell the kdifference between polar and nonpolar you look at the difference in electronegativityof the two atoms that are bonded

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27.   Luke Bishop Says:
    February 6th, 2009 at 11:17 AM

    The lava lamp works because LIKE dissolves LIKE

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28.   taylor meador Says:
    February 6th, 2009 at 12:18 PM

    ashley:
    intermolecular forces are forces that act between molecules and include momentary attractions between those molecules

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29.   Lauren Mcgrath Says:
    February 6th, 2009 at 6:04 PM

    audrey- Dipole-dipole forces cause one side of the atoms electrons to attract the other atoms electrons, therefore creating a bond

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30.   Chris Says:
    February 6th, 2009 at 10:09 PM

    Are intermolecular forces stronger or weaker than covalent

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31.   Beth Ann Gooch Says:
    February 6th, 2009 at 11:58 PM

    Chris: intermolecular forces are stronger.

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32.   Autumn Says:
    February 6th, 2009 at 11:59 PM

    how strong are hydrogen bonds?

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33.   Ryan DuBois Says:
    February 6th, 2009 at 11:59 PM

    what is the weakest intermolecluar force?

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    Carlee Edwards Reply:
    February 9th, 2009 at 9:11 PM

    London dispersion forces are the weakest.

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34.   aniah lust Says:
    February 7th, 2009 at 1:26 AM

    this was the hardest part to study
    im trying to see if it will post my comment since im on a different computer!

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35.   aniah lust Says:
    February 7th, 2009 at 1:28 AM

    y does it chose to work now!!!and not the first time

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36.   aniah lust Says:
    February 7th, 2009 at 1:29 AM

    why does it choose to work now!!

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37.   trey Says:
    February 8th, 2009 at 9:54 PM

    What are hybrid orbitals?

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