HCl is a polar molecule, how come the intermolecular forces among its molecules consist of London dispersion force besides dipole dipole attraction ? Thank for answering.
1 Answer
Dispersion forces exist by virtue of having electrons. Electron density instantaneously changes at each moment in time, forming weak temporary dipoles, which we term dispersion interactions between particles.
All molecules and atoms have London dispersion (i.e. van der Waals) forces. With
#stackrel(delta^+)"H"-stackrel(delta^-)"Cl"#
Even though
Since water hydrogen-bonds, the most fair trade in interaction energy would be from strong dipole-dipole interactions, not weak dispersion.
Or if you prefer, the saying, "like dissolves like" results in the same conclusion.
