• Scariest Story Contest

    Now that it's getting close to Halloween, we're running a contest to hear your scariest stories! These can be scary stories that you've experienced or stories that you've heard and the story with the most reactions will win!

    JOIN CONTEST

Chemistry Question: Intermolecular Forces

MortellarPreMed

Full Member
Sep 30, 2012
86
0
VA
  1. Pre-Medical
    How do you determine which molecules have stronger intermolecular forces in comparriosn to each other.

    For example:

    CO2 or OCS

    SeO2 or SO2

    An explanation as to why which one would have a stronger intermolecular forces would be much appreciated.
     

    matanpucla

    Full Member
    May 29, 2012
    257
    0
    1. Pre-Medical
      How do you determine which molecules have stronger intermolecular forces in comparriosn to each other.

      For example:

      CO2 or OCS

      SeO2 or SO2

      An explanation as to why which one would have a stronger intermolecular forces would be much appreciated.

      in the case of SeO2 v SO2 SeO2 is stronger, because the only difference is the central atom Se vs S, and Se is larger, therefore you get more dispersion.

      i think in the case of CO2 v OCS, OCS is stronger because it is more polar. but not quite 100 percent on that one.
       

      MortellarPreMed

      Full Member
      Sep 30, 2012
      86
      0
      VA
      1. Pre-Medical
        in the case of SeO2 v SO2 SeO2 is stronger, because the only difference is the central atom Se vs S, and Se is larger, therefore you get more dispersion.

        i think in the case of CO2 v OCS, OCS is stronger because it is more polar. but not quite 100 percent on that one.

        I know youre right about SeO2 v SO2,why does the size of the atom (Se) make a difference in intermolecular forces?
         
        About the Ads

        dsoz

        Accepted OHSU C/O 2017
        5+ Year Member
        Apr 8, 2011
        1,578
        33
        1. Medical Student
          in the case of SeO2 v SO2 SeO2 is stronger, because the only difference is the central atom Se vs S, and Se is larger, therefore you get more dispersion.

          i think in the case of CO2 v OCS, OCS is stronger because it is more polar. but not quite 100 percent on that one.

          CO2 has polar bonds, but a net zero dipole moment because of the vector forces cancel out. Therefore the molecule is non-polar.

          OCS is polar because the C=S bond is less polar than the C=O bond, so there is a net polarity to the molecule. This makes it have greater intermolecular forces.

          HTH

          dsoz
           

          MedPR

          Membership Revoked
          Removed
          Dec 1, 2011
          18,579
          52
          1. Pre-Podiatry
            How do you determine which molecules have stronger intermolecular forces in comparriosn to each other.

            For example:

            CO2 or OCS

            SeO2 or SO2

            An explanation as to why which one would have a stronger intermolecular forces would be much appreciated.

            You ask your professor or consult your MCAT books.

            Sent from my SGH-T999 using SDN Mobile
             
            in the case of SeO2 v SO2 SeO2 is stronger, because the only difference is the central atom Se vs S, and Se is larger, therefore you get more dispersion.

            i think in the case of CO2 v OCS, OCS is stronger because it is more polar. but not quite 100 percent on that one.

            Both questions can be explained similarly. As someone mentioned, SDN isn't for homework help.
             
            About the Ads
            This thread is more than 8 years old.

            Your message may be considered spam for the following reasons:

            1. Your new thread title is very short, and likely is unhelpful.
            2. Your reply is very short and likely does not add anything to the thread.
            3. Your reply is very long and likely does not add anything to the thread.
            4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
            5. Your message is mostly quotes or spoilers.
            6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
            7. This thread is locked.