An open flask containing air is heated from 300 K to 500 K. What percentage of air will be escaped to the atmosphere, if pressure is keeping constant?

Options

A. 80
B. 40
C. 60
D. 20

Answer

2

Explanation

`V_(1)=V,T_(1)=300K," "T_(2)=500K," "V_(2)rArr`
At constant pressure `V_(1)T_(2)=V_(2)T_(1)`
`:. " "V_(2)=(V_(1)T_(2))/(T_(1))=(Vxx500)/(300)=(5V)/(3)`
`:'` Volume of air escaped `=` final volume `- ` initial volume
`=(5V)/(3)-V=(2V)/(3)`
`:. " "%` of air escaped `=(2V//3)/(5V//3)xx100=40%`