30: Unit D
Assignment Booklet D1
39. An example of an exothermic fusion reaction is H+ H+ H+ n.
The energy released from this reaction is due to a small change in mass that occurs as the
re transformed into the products. Using the mass values given under the heading
"Nuclear Chemistry" in the Science Data Booklet, calculate the change in mass per mole of
hydrogen-2 that occurs in the reaction.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

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.