Air is filled at 60deg C in a vessel of open mouth. Upto what temperature should the vessel be heated so that one-fourth of the air may escape?

Question

Ans 171degC

Answer 1

PV = n R T
P,V and R are constant
so n T is constant
n1 T1 = n2 T2
n2 = .75 n1

n1 T1 = .75 n1 T2
T2 = T1/.75
T1 = 273 + 60 = 333
so
T2 = 333/.75 = 444
444-273 = 171

Answer 2

thank you soo much :)

Answer 3

thnx

Answer 4

But if we use Charles law such that v1/t1= v2/t2
Then the answer becomes 249.75 K
Ad how the volume is constant.
It is I think volume is changing by 3/4 parts. I'm in dilemma. Can anyone clear my doubt ??

Answer 5

Thats the answer according to S.Chand's also 171K enx for solving

Answer 6

Jagat we cannot use Charles law because the container is open moles at not constant

Answer 7

Can anyone explain it more clearly.......please as soon as possible 😞😞😞

Answer 8

Why can't we use charle's law??