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 the forces of attraction or repulsion which act between neighboring particles (atoms, molecules, or ions ). These forces are weak compared to the intramolecular forces, such as the covalent or ionic bonds between atoms in a molecule.