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At 90^(@)C, liquid A has a vapour pressu...

At `90^(@)C`, liquid A has a vapour pressure of 808 torr and liquid B has a vapour pressure of 323 torr. If A and B form an ideal solution, what is the mole fraction of liquid A in a mixture of A and B that will boil at `90^(@)C` and 1 atmosphere pressure ?

Text Solution

Verified by Experts

`P_(s)= 760` torr, because solution boils at `90^(@)`
`P= chi_(A) P_(A)^(@) + (1- chi_(A)) P_(B)^(@)`
`760= 808a+ (1-a) xx 323`
Mole fraction of liquid A= 0.90
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