If a 2 litre flask of n2 at 20 c and 70cm P is connected with a 3 litre flask of O2 at the same temperature and 100cm P. What will be the final pressure after the gases have thoroughly mixed at the same temperature as before? also calculate the mole percent of each gas in the resulting mixture .The volume of stopcock may be neglected.
Answeris 88..please tell
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Answer:
Let final pressure be p cm
number of mole of N
2
=
RT
PV
n
1
=
R×20
o
C
70cm×2litre
number of mole of O
2
=
RT
PV
n
2
=
R×20
∘
C
100 cm×3litre
final pressure =
v
(n
1
+n
2
)RT
=
3+2
(
R×20
∘
C
70cm×2
+
R×20
∘
C
100cm×3
)×R×20
∘
C
=170 cm
Mole %
n
1
=
20R
140
+
20R
300
20R
140
=35%
n
2
=65%
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