Mixture of volatile components A and B has total vapour pressure (in torr) p = 254 — 119 XA where XA is mole fraction of A in mixture. Hence pAo and pBo are (in torr)
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a
254, 119
b
119, 254
c
135, 254
d
119, 373
answer is C.
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Detailed Solution
P=XAPA0+XBPB0 =(PA0-PB0)XA+PB0 =PB0 + (PA0-PB0)XA So, PBo= 254PAo-PBo=-119PA0=135