1. Tardigrade
  2. Question
  3. Chemistry
  4. Benzene (C6H6, 78 g/mol) and toluene (C7H8, 92 g/mol) form an ideal solution At 60°C the vapour pressure of pure benzene and pure toluene are 0.507 atm and 0.184, respectively. The mole fraction of benzene in a solution of these two chemicals that has a vapour pressure of 0.350 atm at 60°

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Q. Benzene $(C_{6}H_{6}, 78 g/mol)$ and toluene $(C_{7}H_{8}, 92\,g/mol)$ form an ideal solution At $60^{\circ}C$ the vapour pressure of pure benzene and pure toluene are 0.507 atm and 0.184, respectively. The mole fraction of benzene in a solution of these two chemicals that has a vapour pressure of $0.350$ atm at $60^{\circ}$

Solutions

Solution:

$0.35=0.507 \times X_{B}+0.184 \times X_{t} \dots (1)$
$X_{B}+X_{t}=1 \dots (2)$
On solving equations (1) and (2), we get
$X_{B}=0.514$