QJEEM19Ch1f15: JEE Main 2019 Chemistry - Class 12 JEEM19Ch1f15 Solution: Liquids A and B form an ideal solution in the entire…

Question

Verified Solution • 2025–26 Session moderate

Liquids A and B form an ideal solution in the entire composition range. At 350 K, the vaapor pressures of pure A and pure B are 7

\times

10³ Pa and 12

\times

10³ Pa, respectively . The composition of the vapor in equilibriumwith a solution containing 40 mole percent of A at this temperature is :

Accepted Answer

y_{A} = \frac{P_{A}}{P_{T o t a l}} = \frac{P_{A}^{0} x_{A}}{P_{A}^{0} X_{A} \times P_{B}^{0} X_{B}}

= \frac{7 \times 10^{3} \times 0.4}{7 \times 10^{3} \times 0.4 + 12 \times 10^{3} \times 0.6}

= \frac{2.8}{10} = 0.28

y_{B} = 0.72

Step-by-Step Verified Solution