Adecorative "ice" sculpture is carved from dry ice (solid co2) and held at its sublimation point of –78.5°c. consider the process in which a co2 sculpture, weighing 389 g, sublimes on a granite tabletop. the temperature of the granite is 12.0°c and the process occurs reversibly. assume a final temperature for the co2 vapor of –78.5°c. the enthalpy of sublimation of co2 is 26.1 kj/mol. calculate the entropy of sublimation for carbon dioxide (the system) j/kmol

increased stability in the completion of fluorine's outer shell.

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.