1.

The value of K_(p) for the reaction at 27^(@)C Br_(2)(l)+CI_(2)(g)hArr2BrCI(g) is 1atm. At equilibrium in a closed container partial pressure of BrCI gas 0.1atm and at this temperature the vapour pressure of Br_(2)(l) is also 0.1atm. Then what will be minimum moles of Br_(2)(l) to be added to 1 mole of CI_(2), initially, to get above equilibrium stiuation,

Answer»

`(10)/(6) MOL es`
`(5)/(6)mol es`
`(15)/(6)mol es`
`2mol es`

SOLUTION :`Br_(2)(l)+CI_(2)(g)hArr2BrCI(g)`
`t=0 1 0`
`(1-x) 2x`
`K_(p)=((P_(BrCl)^(2)))/(P_(Cl_(2)))=1 "so", P_(Cl_(2))=(P_(BrCl))^(2))=0.01atm`
then at equilibrium, `(n_(BrCl))/(n_(Cl_(2))=(0.1)/(0.01)=10=(2x)/(1-x)`
So, `10-10x=2x "or" x=(10)/(12)=(5)/(6)mol es`
Mole of `Br_(2)(l)` required for maintaining VAPOUR PRESSURE of `01atm`
`=2xx(5)/(6)mol es=(10)/(6)mol es="moles of" BrCl(g)`.
Moles required for taking part in reaction`="moles of" Cl_(2)` used up`=(5)/(6)mol es`.
Hence TOTAL moles required`=(5)/(6)+(10)/(6)=(15)/(6)mol es`.


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