How much heat, in calories, is needed to raise the temperature of 200.0 g of water from
75.0 o C to 100.0 o C and then turn the water into a vapor?
(H vap for water is 540 cal/g)

the temperature of the gas, in k, not celsius.

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.

gas and precipitate r the correct answers