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Question

A gas is filled in a container of volume V at 121oC. To what temperature should it be heated in order that 14th of the gas may escape out of the vessel ?

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Solution

REF.Image
Let us take,
at 121C there is 'n'
mole of gas in the
container of volume 'v'
and pressure is 'p'
'v', 'n', 'p'
T=121C
=394k
Now,
on heating, since the gas
escapes. Therefore the pressure will
remain constant
Applying ideal gas equation
pV= nRT
pV=nR394 ___ (i)
Let us say, at temperature T0, the no. of
moles of gas in container becomes n4
pV=n4RT0 ___ (ii)
from (i) & (ii)
394nR=n4RT0
T0=394×4=1376K
T0=1376K or 1103C

1158148_1187061_ans_f22fa89cdaa94770af0dec16bc9fd111.jpg

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