Achemical engineer studying the properties of fuels placed 1.090 g of a hydrocarbon in the bomb of a calorimeter and filled it with o2 gas. the bomb was immersed in 2.550 l of water and the reaction initiated. the water temperature rose from 20.00°c to 23.55°c. if the calorimeter (excluding the water) had a heat capacity of 403 j/k, what was the heat of reaction for combustion (qv) per gram of the fuel? (d for water = 1.00 g/ml; c for water = 4.184 j/g·°c.) enter your answer in scientific notation.

wish i could but im not suited 4 this

explanation:

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

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.