Question

An open mouthed bottle contains a gas at 60°C The temperature to which the bottle should be heated so that of the mass of the
gas may leave it is​

Answer 1

M1=M,T1=60+273=333K

M2=M−M4=3M4 (as 1/4th part of air escapes)

If pressure and volume of the gas remain constant, then MT= constant

∴T2T1=M1M2=(M3M/4)=43

⇒T2=43×T1=43×333=444K=171∘C