Development of the Modern Freezer. Bacteria are usually the cause of food decay, but they can't grow as well or at all in freezing temperatures, which are at 32 degrees Fahrenheit (0 degrees Celsius) or lower.
HF- polar molecule: dipole-dipole forces. There are also dispersion forces and H bond between HF. BF3- nonpolar: dispersion forces. Ar- Dispersion forces between Ar atoms.
Molecular interaction is electrical in nature and consists of forces of attractive forces (orientation, induction, and dispersion forces) and repulsive forces. Orientation forces act between polar molecules (that is, molecules that have electric dipole moments).