Given the following bond energies: câc 347 kj/mol c=c 614 kj/mol câo 358 kj/mol c=o 799 kj/mol câh 413 kj/mol oâh 463 kj/mol oâo 146 kj/mol estimate δ h for the reaction h o ch oh â h co 2h o.

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.