The volume of air in a diving bell changes as it descends into deep water. if the air in a diving bell occupies 9.50 l at 1.02 atm and 20.1 c what will be the volume of the air at 1.55 atm and 15.0 c

V₂ = 6.14 L

Explanation:

Given data:

Initial volume = 9.5 L

Initial pressure = 1.02 atm

Initial temperature = 20.1 °C (20.1 +273 = 293.1 K)

Final temperature = 15°C (15+273 = 288 K)

Final volume = ?

Final pressure = 1.55 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₁V₁/T₁ = P₂V₂/T₂  

V₂ = P₁V₁T₂/T₁ P₂

V₂ = 1.02 atm × 9.50 L × 288 K / 293.1 K × 1.55 atm

V₂ = 2790.72 atm. L.K / 454.305 K. atm

V₂ = 6.14 L

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.