Their flight takes off in a disturbing rainstorm and encounters the kind of turbulence that has the co-pilot crying out, Oh, Lord!. But Whip powers them at high speed into an area of clear sky, before a mechanical malfunction sends the aircraft into an uncontrollable nosedive.
As a result, the strongest type of intermolecular interaction between molecules of these substances is the London dispersion force . Due to the fact that the polar bonds do not cancel in the remaining molecules, they exhibit dipole - dipole interactions: these are stronger than London dispersion forces. However, #HF# exhibits hydrogen bonding - a stronger force still that is similar to the dipole - dipole interaction - whilst #CHF_3# does not. Thus, strength of intermolecular forces between molecules of each of these substances can be expressed, in terms of strength, as: #CF_4 = OF_2 < CHF_3 < HF#.
Intermolecular forces are physical forces between molecules. They explain how molecules interact with each other. The strength or weakness of intermolecular forces determine the state of matter of a substance (e.g., solid, liquid, gas) and some of the chemical properties (e.g., melting point, structure).