At a particular temperature, the vapour pressure of two liquids A and B are 120 and 180 mm Hg respectively. If 2 mole of A and 3 mole of B are mixed t

Question

At a particular temperature, the vapour pressure of two liquids A and B are 120 and 180 mm Hg respectively. If 2 mole of A and 3 mole of B are mixed t

At a particular temperature, the vapour pressure of two liquids A and B are 120 and 180 mm Hg respectively. If 2 mole of A and 3 mole of B are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm Hg)
A. 156
B. 145
C. 150
D. 108

Monjur Alahi

8 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
`P_("solution") = x_(A) P_(A)^(@) +x_(B) P_(B)^(@)`
`= (2)/(5) xx 120 mm +(3)/(5) xx 180 mm`
`= (1)/(5) [240 +540] mm = (780)/(5) = 156 mm`

8 views Answered 2023-02-05 15:29