3 of a certain quantity of air occupies 20l at o°c
and 3 atm Pressure, then find
find its volume at STP
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1
dry gas
=P
observed
−aqueous tension
Aqueous tension = P
observed
−P
dry gas
P
observed
=0.9atm
P
dry gas
=?
According to combined gas law
T
1
P
1
V
1
=
T2
P
2
V2
[Experimental condition STP condition]
Pressure of dry gas P1=
T
2
P
2
V
2
×
V
1
T
1
=1×0.080283×2730.1=0.7717atm
Aqueous tension = P
observed
−P
dry gas
=0.9−0.7717atm=0.1283atm
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