Estimate the diffusivity of naphthalene in air at 323 k and 1.42 bar % by the wilke_lee equation. naphthalene: normal boiling point = 491.1, critical volume = 413 cm3/mol, mw = 128.2; air: sigma = 3.620 angstrom, epsilon/kapa = 97 k, mw =29.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.