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Grade 12th passThermal Physics

Question:The volume of balloon filled partially with helium is 30 m3 at the earth's surface where the pressure is 76cm(mercury)and the temperature is 27 degree C.If this balloon rise up to a height where the pressure is 7.6cm(mercury)and the temperature is -54 degree C,what will be the volume of the gas there ?

parmanand tiwari

8 Years agoGrade 12th pass

1 Answer

Ajay Kumar

8 Years ago

Hi Parmanand,

As you know

PV=nRT or nR=PV/T where nR is constant so we have

P₁V/T= P₂V₂/T₂

where V₁ = 30m³, P₁ = 76cm, T₁ = 273+27=300°K

V₂ = ? , P₂ = 7.6cm, T₂ = 273+(-54)=219°K

after putting these values in given equation you will have

V₂ = 219m³.

If you still have doubt Pl ask.

Regards,

Ajay Kumar

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