CBSE Class 12-science Answered
plz answer quickly!!!!
Asked by | 09 Apr, 2008, 12:59: AM
Expert Answer
Dear Student,
Let:
pA = Vapour pressure of benzene=500 mm Hg
n= mole fraction of benzene
pB = Vapour pressure of toluene= 200 mm Hg
pt = Total pressure = 380 mm Hg
Using raoult's law for ideal solutions we have:
pA n + pB (1-n) = pt
or
500 n + 200 (1-n) = 380
or
300 n = 180
or
n=0.6
Hence mole fraction of Benzene in the mixture is 0.6.
Answered by | 13 Jun, 2008, 12:41: PM
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