The time required for a given volume of N2 to diffuse through an orifice is 35 seconds.
Calculate the molecular weight of a gas which requires 50 sec to diffuse through the
same orifice under identical conditions.
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Answer:
use this to solve
since kinetic energy of every gases dipends only from the absolute temperature (Ek = KT) and then at a certain temerature is equal for every gasses, and kinetic energy is also given from
E
k
=
1
2
m
v
2
you have that v^2 is proportional to the inverse of the molecular mass.
For that, the Graham's law says
M
b
M
a
=
V
2
a
V
2
b
but speed is proportional to the inverse of the time occurred to diffuse so
M
b
=
M
a
×
t
2
b
t
2
a
=
40
g
m
o
l
×
60
2
45
2
=
71
g
m
o
l
Explanation:
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