Question

sulle muthre behaces cdealey we wul we Raolts law
Moles of ( _{n}^{text {hand }}=n_{B}=frac{text { moles of } B}{text { Total moles }}=frac{3}{4} ) Then, ( quad P_{A}=n_{A} times P^{0} A )
[
begin{array}{c}
P_{A}=frac{1}{9} times 100 mathrm{mm} mathrm{Hg}=25 mathrm{mm} mathrm{hg}
P_{B}=mathrm{MB} times P_{B}=frac{3}{4} times 80 mathrm{mm} mathrm{Mg}
=60 mathrm{mm} mathrm{Mg}
end{array}
]
The pal parmule
( Rightarrow quad P_{7}=P_{A}+P_{B}=25+60 )
( =85 mathrm{mm} mathrm{Hg} )

# A mixture contains 1 mole of volatile liquid A (P =100 mm Hg) and 3 moles of volatille liquid BP: 80 mm Hg). If solution behaves ideally, the total vapour pressure of the distillate is (A) 85 mm Hg (B) 85.88 mm Hg (C)90 mm Hg (D) 92 mm Hg

Solution