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.
Reaction of fluorine with the halogens. Fluorine, F 2, reacts with chlorine, Cl 2, at 225Â°C to form the interhalogen species ClF. The trifluoride chlorine(III) fluoride is also formed and the reaction does not go to completion. Cl 2 (g) + F 2 (g) â 2ClF(g). Cl 2 (g) + 3F 2 (g) â 2ClF 3 (g). Under more forcing conditions, excess fluorine reacts with chlorine, Cl 2, at 350Â°C and 225 atmospheres pressure to form the interhalogen species ClF 5.