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.
They are called intermolecular forces. One is hydrogen bonding, in which hydrogen atoms bond with nearby fluorine, oxygen, or nitrogen atoms. Van der waals forces occur betwee â¦ n dipole-dipole, dipole-induced dipole, and induced dipole-induced dipole molecules.