C8h18(l)+252o2(g)? 8co2(g)+9h2o(g)calculate ? hrxn for the combustion of octane (c8h18), a component of gasoline, by using average bond energies. calculate ? hrxn for the combustion of octane by using enthalpies of formation from appendix iib in the textbook. the standart enthalpy of formation of c8h18 is -250 kj/mol. what is the percent difference between the two results? which result would you expect to be more accurate? a) the value calculated from the heats of formationb) the value calculated from the average bond energies

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants

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.