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An open flask containing air is heated f...

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?

A

`80`

B

`40`

C

`60`

D

`20`

Text Solution

Verified by Experts

The correct Answer is:
B
`V_(1)= V, T_(1)= 300K, T_(2)= 500K, V_(2)= ?`
At constant pressure `V_(1)T_(2)= V_(2)T_(1)" " therefore V_(2)= (V_(1)T_(2))/(T_1)= (V xx 500)/(300)= (5V)/(3)`
Volume of air escaped = final volume - initial volume `=(5V)/(3)-V= (2V)/(3)`
`therefore %" of air escaped "=(2V"/"3)/(5V"/"3)xx 100= 40%`.
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