Connect the boxes. Which force (boxes on the left) is related to or explains a f
ID: 715755 • Letter: C
Question
Connect the boxes. Which force (boxes on the left) is related to or explains a fact, example or observation (on the right Attractive Forces Between Molecules This type of attractive force exists between all molecules (polar or nonpolar) A positive side of a molecule is attracted to a negative side of a molecule. London dispersion forces Extremely strong interaction betweern moleculés that contain an O-H bond These forces are generally weak Extremely strong interactions between molecules that contain an N-H bond These forces exist between polar molecules Dipole-dipole forces The higher is the mass of a molecule, the stronger are those attractive forces between molecules. These forces result in an attraction between molecules of methane CH Hydrogen bonding Extremely strong interactions between molecules that contain an F-H bond These forces result in an attraction between an methanol CH,OH and a water molecules. These forces are the only forces between nonpolar molecules.Explanation / Answer
1. London dispersion force is also called as induced dipole-induced dipole attraction.
These are weak intermolecular forces. Electrons constantly move around the nucleus, sometimes due to unsymmetrical distribution of electrons an instantaneous dipole is created. This dipole can induce dipole in the adjacent atom resulting in electrostatic attraction between them.
These forces are present between both polar and non-polar molecules. Larger or heavier is the atom stronger will be the dispersive forces. The forces in methane are London dispersion forces. These are the only forces in non-polar molecules.
2. Dipole-Dipole forces: Exist between polar molecules. It is an attractive force between positive end of one molecule and negative end of another molecule.
For example: Iodine moochloride, ICl: Chlorine is partially negative and Iodine is partially positive (ICl---ICl).
3. Hydrogen bonding: These are strong attraction forces between hydrogen (which is bonded to an electronegative element such as N, O, F) and an electronegative element.
For example: H-F-----H-F , hydrogen bonding between hydrogen of one HF molecule to Fluorine of another HF molecule. Seen in molecules containing N-H, O-H or F-H bonds.
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