InterviewSolution
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InterviewSolution
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At `25^(@)C`, the total pressure of an ideal solution obtained by mixing 3 mole of A and 2 mole of B, is 184 torr. What is the vapour pressure (in torr) of pure B at the same temperature (Vapour pressure of pure A at `25^(@)C` is 200 torr) ?A. 180B. 160C. 16D. 100 |
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Answer» Correct Answer - B `P=P_(A)+P_(B)=x_(A)p_(A)^(@)+ x_(B)p_(B)^(@)` where P = total pressure, p = partial pressure, `p^(@)` = vapour pressure, x = mole fraction or `184=(3)/(5)xx200+(2)/(5)xx p_(B)^(@)` or, `184 =120+(2)/(5)p_(B)^(@)` or `p_(B)^(@)=160` torr. |
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