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Lowering of vapour pressure of an aqueou...

Lowering of vapour pressure of an aqueous solution of a non-volatile non-electrolyte 1 m aqueous solution at `100^(@)C` is,

A

14.12 Torr

B

312 Torr

C

13.45 Torr

D

352 Torr

Text Solution

Verified by Experts

The correct Answer is:
C
`p^(@) = 760` Torr
A 1m aqueous solution contains 1 mol of solute in 100g (55.5 mol) of water
`:. X_(B) = (1)/(1+55.5) = (1)/(56.5)`
`(Deltap)/(p) = x_(B)`
`Deltap = px_(B)`
`=(760 "Torr")/(56.5) = 13.45` Torr
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