1.

A balloon partialy filled with the gas volume 30m at on surface of earth where pressure is 76 cm of Hg and temperature is 27°C. What will be the increase in volume of gas balloon when it rises to a height where temperature become (-54^(@)C) and pressure become 7.6 cm of Hg.

Answer»

SOLUTION :Given `P_(1)=36 cm Hg`
`V_(1)=30 m^(3)`
`T_(1)=27+273=300 K`
`P_(2)=7.6 cm of Hg`
`V_(2)= ?`
`T_(2)=-54+273=219 K`
By gas equation `(P_(1)V_(1))/(T_(1))=(P_(2)V_(2))/(T_(2))`
`V_(2)=(P_(1)V_(1)T_(2))/(T_(1)P_(2))=(76xx30xx219)/(300xx7.6)`
`=219 m^(3)`
So INCREASE in volume of gas
`=219-30 m^(3)`
`=189m^(3)`


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